Only Strays spawn in various frozen biomes
In various frozen biomes, the only hostile mobs that spawn are the skeletons (as expected most of them spawn as strays).
Steps to reproduce:
- Create and open a new world with seed 297169206, mob spawning disabled, and always day selected.
- Issue the command /time set midnight.
- Issue the command /tp 626 86 -285.
- Issue the command /gamerule domobspawning true.
- Wait until a bunch of mobs have spawned.
- Issue the command /kill @e[family=monster]. Note that only strays were present to be killed.
Additional information:
- The pinned comment contains root cause analysis. In short, the biome JSON files are missing the "monster" tag.
Affected biomes:
- Frozen River (frozen_river)
- Legacy Frozen Ocean (legacy_frozen_ocean) - no longer generate in new worlds
- Snowy Mountains (ice_mountains) - no longer generate in new worlds
- Snowy Plains (ice_plains)
This report (including comments) uses a mixture of Bedrock and Java biome names. The following table can be used to translate the Java names to Bedrock biome names.
| Java Name | Bedrock Name |
| Snowy Tundra | Ice Plains |
| Snowy Mountains | Ice Mountains |
| Snowy Taiga | Cold Taiga |
| Snowy Taiga Hills | Cold Taiga Hills |
Linked Issues
is duplicated by6
BDS-4421Snowy biome only spawn strays Duplicate
MCPE-62900Monster Bug in the SnowfieldDuplicateMCPE-105731There are only strays that spawn in snowy tundra biome and snowy mountain biome as hostile mobsDuplicateMCPE-129886Phantom spawningDuplicateMCPE-178929Only stray spawn on the surface of snow plainsDuplicateMCPE-184988Stray 100% spawn rate issue in some snow biomesDuplicate- Unresolved
Specialistol- 45
- 19
- Confirmed
- 178442, 390696
- Multiple
1.21.0.20 Preview - 1.21.51 Hotfix
1.21.0.20 Preview 1.20.70.24 Preview 1.20.70.22 Preview 1.18.0.22 Beta 1.17.40.21 Beta 1.16.20.50 Beta 1.16.0.64 Beta 1.14.20 Hotfix 0.16.0 0.17.0.2 1.9.0 1.10.0 1.13.0 1.14.60 Hotfix 1.16.0 1.16.1 1.16.40 Hotfix 1.16.100 1.16.221 Hotfix 1.17.30 1.17.40 1.20.12 Hotfix 1.20.62 Hotfix 1.21.2 Hotfix 1.21.21 Hotfix 1.21.30 1.21.43 Hotfix 1.21.44 Hotfix 1.21.51 Hotfix
Created Issue:
Only Stays and Skeletons spawn on iceplains biome
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Only Strays and Skeletons spawn on iceplains biome
![[MCPE Mod] Celesian](../../../data/avatars/users/81635.png){kind=small}
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: `297169206` Coordinates of ice plains: 463 118 -215
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: `297169206` Coordinates of ice plains: 463 118 -215
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 463 118 -215
![[MCPE Mod] Auldrick](../../../data/avatars/users/10122.svg){kind=small}
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 463 118 -215
Additional information by [MCPE Mod] Auldrick:
The Ice Plains biome is also known as Snowy Tundra. The coordinates given above are in a chunk that contains Snowy Tundra and Snowy Mountains biomes.
![[Mojang] Mega_Spud (Jay Wells)](../../../data/avatars/users/92696.png){kind=small}
![[Mod] OcelotOnesie](../../../data/avatars/users/43220.png){kind=small}
is duplicated by
is duplicated by
![[Mod] GoldenHelmet](../../../data/avatars/users/18951.svg){kind=small}
Title updated by GoldenHelmet April 20, 2020
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 463 118 -215
Additional information by [MCPE Mod] Auldrick:
The Ice Plains biome is also known as Snowy Tundra. The coordinates given above are in a chunk that contains Snowy Tundra and Snowy Mountains biomes.
Title updated by GoldenHelmet April 20, 2020
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 463 118 -215
Additional information by [MCPE Mod] Auldrick:
The Ice Plains biome is also known as Snowy Tundra. The coordinates given above are in a chunk that contains Snowy Tundra and Snowy Mountains biomes.Title updated by GoldenHelmet April 20, 2020
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 463 118 -215
Additional information by [MCPE Mod] Auldrick:
The Ice Plains biome is also known as Snowy Tundra. The coordinates given above are in a chunk that contains Snowy Tundra and Snowy Mountains biomes.
Only Straysand Skeletons spawn on iceplainsbiomeOnly Strays spawn in Snowy Tundra biome
![[Mod] Jarl-Penguin](../../../data/avatars/users/92849.png){kind=small}
is duplicated by
![[Bot] Arisa](../../../data/avatars/users/43007.png){kind=small}
is duplicated by
Title updated by GoldenHelmet April 20, 2020
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 463 118 -215
Additional information by [MCPE Mod] Auldrick:
The Ice Plains biome is also known as Snowy Tundra. The coordinates given above are in a chunk that contains Snowy Tundra and Snowy Mountains biomes.Title updated by GoldenHelmet April 20, 2020
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 463 118 -215
Additional information by [MCPE Mod] Auldrick:
This report (including comments) uses a mixture of Bedrock and Java biome names. The following table can be used to translate the Java names to Bedrock biome names.
Java Name Bedrock Name Snowy Tundra Ice Plains Snowy Mountains Ice Mountains The coordinates given above are in a chunk that contains Ice Plains and Ice Mountains biomes.
Title updated by GoldenHelmet April 20, 2020
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 463 118 -215
Additional information by [MCPE Mod] Auldrick:
This report (including comments) uses a mixture of Bedrock and Java biome names. The following table can be used to translate the Java names to Bedrock biome names.
Java Name Bedrock Name Snowy Tundra Ice Plains Snowy Mountains Ice Mountains Snowy Taiga Cold Taiga Snowy Taiga Hills Cold Taiga Hills The coordinates given above are in a chunk that contains Ice Plains and Ice Mountains biomes.
relates to
relates to
is duplicated by
![[Mod] EVGENSYPERPRO](../../../data/avatars/users/92853.png){kind=small}
is duplicated by
relates to
Title updated by GoldenHelmet April 20, 2020
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains:
463 118-215Additional information by [MCPE Mod] Auldrick:
This report (including comments) uses a mixture of Bedrock and Java biome names. The following table can be used to translate the Java names to Bedrock biome names.
Java Name Bedrock Name Snowy Tundra Ice Plains Snowy Mountains Ice Mountains Snowy Taiga Cold Taiga Snowy Taiga Hills Cold Taiga Hills The coordinates given above are in a chunk that contains Ice Plains and Ice Mountains biomes.
Title updated by GoldenHelmet April 20, 2020
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 626 86 -285
Additional information by [MCPE Mod] Auldrick:
This report (including comments) uses a mixture of Bedrock and Java biome names. The following table can be used to translate the Java names to Bedrock biome names.
Java Name Bedrock Name Snowy Tundra Ice Plains Snowy Mountains Ice Mountains Snowy Taiga Cold Taiga Snowy Taiga Hills Cold Taiga Hills The coordinates given above are in a chunk that contains Ice Plains and Ice Mountains biomes.
Only Strays spawn inSnowy TundrabiomeOnly Strays spawn in Ice Plains biome
Title updated by GoldenHelmet April 20, 2020
This is another thing which may be intentional, but release notes do not mention this. In the ice plains biome, the only hostile mobs spawn are the skeletons (as expected most of them spawn as strays). No zombies, spiders, or creepers spawn.
Test seed: 297169206 Coordinates of ice plains: 626 86 -285
Additional information by [MCPE Mod] Auldrick:
This report (including comments) uses a mixture of Bedrock and Java biome names. The following table can be used to translate the Java names to Bedrock biome names.
Java Name Bedrock Name Snowy Tundra Ice Plains Snowy Mountains Ice Mountains Snowy Taiga Cold Taiga Snowy Taiga Hills Cold Taiga Hills The coordinates given above are in a chunk that contains Ice Plains and Ice Mountains biomes.
In the ice plains biome, the only hostile mobs that spawn are the skeletons (as expected most of them spawn as strays).
Steps to reproduce:
- Create and open a new world with seed 297169206, mob spawning disabled, and always day selected.
- Issue the command /time set midnight.
- Issue the command /tp 626 86 -285.
- Issue the command /gamerule domobspawning true.
- Wait until a bunch of mobs have spawned.
- Issue the command /kill @e[family=monster]. Note that only strays were present to be killed.
Additional information:
- The pinned comment contains root cause analysis. In short, the biome JSON files are missing the "monster" tag.
- Ice Mountains and Legacy Frozen Ocean biomes are also affected, though these are no longer generated in new worlds.
This report (including comments) uses a mixture of Bedrock and Java biome names. The following table can be used to translate the Java names to Bedrock biome names.
Java Name Bedrock Name Snowy Tundra Ice Plains Snowy Mountains Ice Mountains Snowy Taiga Cold Taiga Snowy Taiga Hills Cold Taiga Hills
In
the ice plainsbiome, the only hostile mobs that spawn are the skeletons (as expected most of them spawn as strays).Steps to reproduce:
- Create and open a new world with seed 297169206, mob spawning disabled, and always day selected.
- Issue the command /time set midnight.
- Issue the command /tp 626 86 -285.
- Issue the command /gamerule domobspawning true.
- Wait until a bunch of mobs have spawned.
- Issue the command /kill @e[family=monster]. Note that only strays were present to be killed.
Additional information:
- The pinned comment contains root cause analysis. In short, the biome JSON files are missing the "monster" tag.
- Ice Mountains and Legacy Frozen Ocean biomes are also affected, though these are no longer generated in new worlds.
This report (including comments) uses a mixture of Bedrock and Java biome names. The following table can be used to translate the Java names to Bedrock biome names.
Java Name Bedrock Name Snowy Tundra Ice Plains Snowy Mountains Ice Mountains Snowy Taiga Cold Taiga Snowy Taiga Hills Cold Taiga Hills In various frozen biomes, the only hostile mobs that spawn are the skeletons (as expected most of them spawn as strays).
Steps to reproduce:
- Create and open a new world with seed 297169206, mob spawning disabled, and always day selected.
- Issue the command /time set midnight.
- Issue the command /tp 626 86 -285.
- Issue the command /gamerule domobspawning true.
- Wait until a bunch of mobs have spawned.
- Issue the command /kill @e[family=monster]. Note that only strays were present to be killed.
Additional information:
- The pinned comment contains root cause analysis. In short, the biome JSON files are missing the "monster" tag.
Affected biomes:
- Frozen River (frozen_river)
- Legacy Frozen Ocean (legacy_frozen_ocean) - no longer generate in new worlds
- Snowy Mountains (ice_mountains) - no longer generate in new worlds
- Snowy Plains (ice_plains)
This report (including comments) uses a mixture of Bedrock and Java biome names. The following table can be used to translate the Java names to Bedrock biome names.
Java Name Bedrock Name Snowy Tundra Ice Plains Snowy Mountains Ice Mountains Snowy Taiga Cold Taiga Snowy Taiga Hills Cold Taiga Hills
Only Strays spawn inIce PlainsbiomeOnly Strays spawn in various frozen biomes
![[MCQA] Bartłomiej Słodkowski](../../../data/avatars/users/18941.svg){kind=small}
(win 10, survival) I don't know about slimes aboveground, but I've not seen a single spider since 16.0.
MCPE-17651 could be related, although in that one I don't see the spiders at night either.
Thank you for your report!
However, this issue is a Duplicate of MCPE-17651.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki
Thank you for your report!
We're actually already tracking this issue at MCPE-17651, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki
None of the pictures attached to this ticket show adequate lighting to prevent monsters other than slimes from spawning.
- Slimes spawning in slime chunks is not affected by light level. The only biomes they shouldn’t spawn in are mushroom fields and snowy tundra (snowy tundra is a bug though, MCPE-17651).
- The skeleton under the tree probably walked there to avoid burning in sunlight. It looks like there are areas nearby without adequate lighting where it could have spawned.
- The zombie on the hill is not close to any visible light sources.
- The pen with the creeper is dark in the middle.
- The field with rotten flesh looks like it has light sources too far apart, especially considering the impact of elevation changes. The carpets closest to the player look like they are 13 blocks apart. Lanterns under the carpet would leave a block at light level 7 at the exact middle.
Based on the above, I am going to request this ticket be resolved as a duplicate of MCPE-302. If you can reproduce monsters spawning where they should not, please make a new ticket with steps to reproduce and unambiguous supporting attachments (pictures, video, or world save export).
@Saw Shi Yang thanks for the world! The reason slimes are not spawning in that slime chunk in that world seed is because of a bug that prevents any monster except surface strays from spawning in the snowy tundra biome. You may wish to add a vote and follow MCPE-17651.
Is some of the area you are exploring a mushroom fields or snowy tundra biome? Monsters do not spawn in caves in those biomes (see MCPE-17651).
Thank you for your report!
However, this issue is Invalid.
Please put only one bug report in each ticket. It is very difficult to keep track of bugs when they are not in their own tickets, and it is easier for you to make multiple tickets than for the mods to separate them. Be sure to search before creating new reports. The issue with snow forming in lines is being tracked as MCPE-73468 and the issue with only strays spawning in snowy tundra is MCPE-17651.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Mojang Support – ✍️ Feedback and Suggestions – 📖 Game Wiki
Thank you for your report!
We're actually already tracking this issue at MCPE-17651, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Relates to MCPE-17651
Thank you for your report!
We're tracking this issue in MCPE-17651, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
What this report describes is exactly the way the vanilla spawn_rules\skeleton.json and spawn_rules\stray.json are written, and spawning in frozen biomes has been like this at least since spawning became data-driven and probably since Bedrock Edition was created (see MCPE-17651). So, this would seem to be working as intended.
- In frozen biomes, strays spawn instead of skeletons. 20% of strays then convert to normal skeletons.
- Strays only attempt to spawn on the surface, not underground.
- In frozen oceans, strays only attempt to spawn from Y = 60 to Y = 66.
These spawning mechanics are used by some players to make more efficient creeper farms in frozen biomes where there is one less mob competing with creepers for spawn attempts underground. So, even though a general mob farm made in the sky in a frozen ocean will not produce bones and arrows, you can make a more efficient and productive gunpowder farm.
The mangrove swamp biome is missing the “monster” tag, just like rivers (MCPE-161245) and snowy plains and snowy mountains (MCPE-17651).
To reproduce:
- Create a world using the Mangrove Swamp seed from the seed picker.
- /fill 16 100 16 31 100 31 stone
- /fill 16 103 16 31 103 31 stone
- Set time to night and observe the platforms from >24 blocks away.
Expected result:
Monsters spawn on the platforms.
Observed result:
Monsters do not spawn on the platforms.
Thank you for your report!
We're tracking this issue in MCPE-17651, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
– I am a bot. This action was performed automatically! The ticket was resolved by one of our moderators, and I left this message to give more information to you.
Thank you for your report!
We're tracking this issue in MCPE-17651, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
– I am a bot. This action was performed automatically! The ticket was resolved by one of our moderators, and I left this message to give more information to you.
Partially able to confirm. Unsure if other entities walk into biome or just have very very low spawn chance. However does seem to only be strays and skeletons seem to be spawning. Underground I'm only finding those mobs and no other type.
Running on iPad Pro iOS 10 PEv16.
Also not sure if related, separate issue, or a realms issue: When on a Realm in ice plains, there are so many spawned skeletons/strays that the server starts to lag. I'm the only one logged in, and can see them jumping forward multiple blocks. Logging out and back in does not solve issue. Waiting for daytime kills some of them, but beyond those taking refuge in shade, assumption is there are many in caves below and/or spawned with armor to protect from sun to prevent being burned. Was so bad I had to stop playing cause I couldn't move without being killed repeatedly.
Note: many are dying as the ground seems little red with bones and arrows. But sheer numbers of spawned mobs makes ratio that survives unplayable.
This happens in 0.17.0.2
If you want a good seed to test this for yourself try the seed ibxspawn2 with the world type set to "old"
I am unable to reproduce this bug in v.1.0.0.2
Test: used the seed "ibxspawn2" and a single creeper spawned and a zombie
I believe this issue isn't what it first appears to be.
I'm in a realm where originally only Skeleton's and Stray's were spawning in the ice plains. I have since built a fairly large structure and lite up most of the area. I've also taken care to kill the Skeleton's and Stray's that are not being automatically killed when at Sunrise due to armor. And since doing this I now have seen creepers, spiders, and zombies also appear.
I believe the issue to be due to the apparent higher than normal spawn levels of Stray's and Skeletons, and that they often will spawn with protective armor. If left alone, they will stay, and the following night another larger number of Skeleton/Stray's spawn, again with a % with protection. Between their ranged attack causing it difficult to kill them in large numbers, and this (seemingly) higher spawn level, it appears that the overall mob level quota gets reached, allowing for no more spawns, and therefore no more zombies, creepers, or spiders to be able to spawn. Does anyone know if this assumption is correct? Do ice plains allow for higher level of spawns? Or is it that both skeletons and strays have different levels that can be reached, eventually blocking off any other type of mob?
Except in your theory, armored zombies would also have stayed.
I was collecting loot (which consist only of bones and arrows) every dawn (after they burned) and kill the remaining (which were only skeletons), to have a clean slate for the next day. I had this process repeated for 10 straight (in game) days, until it was enough of a hassle to go down at every dawn (I was building a snow tower). So it isn't mob limits or visual bias.
Regardless, report claims it no longer repros, I guess we'll find out in a few months when 1.0 releases, or if they decide to integrate fixes back to 0.16.
Of possible relevance: http://www.minecraftforum.net/forums/minecraft-discussion/survival-mode/2640790-killed-armor-almost-destroyed-by-skeleton-while?page=2
Could it be that there is code to allow for spawning on snow for Strays (and therefore Skeletons)? Thus only when you start having torches down and clean blocks available would non-skeletons spawn. I know for a fact that Skeletons and Strays can spawn on snow. Don't know about other mobs.
This issue has been readded to the game, is very easy to spot in current bedrock updates. Please re-open this report!
Confirmed in 1.9.0 using Windows 10 and the seed and coordinates given in the description. Only strays spawned on the surface, not even skeletons. This was repeated in several tests after switching to Peaceful and back. The only mobs I found in caves were zombies that were presumably spawned by a dungeon spawner next to them and one stray that probably wandered in from the surface. The number of strays spawned on the surface seemed excessive. This may have been either a cause or a consequence of no other hostile mobs spawning. I could speculate that the monster spawning algorithm, after determining that this is an ice spikes biome, incorrectly tests whether a skeleton is being spawned and replaces all spawned mobs with strays.
I have also seen this on xbox one bedrock 1.9.0
Only hostile spawn was surface strays at night. No cave spawn at all was detected by me. No hostile spawn at all during the day (which probably proves that no cave spawn was occurring)
seed = -904515
coords = 1671, 12, 1861 where I had carved out a view point for a slime chunk which is at 1664/1888, 1679/1903
No slime spawned at all and no hostile mobs even when I had removed lighting. There should have been a lot of slime during the day because there were no hostile mobs at all. Confirmed with commands to kill entities
Biome was snowy tundra (according to chunkbase)
Thanks,
Guys. Ice biomes are supposed to only spawn strays. It's just how the biome works
Tested and confirmed in 1.14.60 using seed provided in the description. I got the same results as Auldrik got in 1.9: only strays spawn in the snowy tundra. According to the wiki entry, this applies applies to snowy mountains as well.
I also looked at the spawning .json files. The problem appears to be that the affected biomes lack the "monster" biome tag. Strays require the "frozen" tag but do not require the "monster" tag, so they are able to spawn in all frozen biomes. Since strays spawn only on the surface, the result is that underground, snowy tundra (and mountains) are just like mushroom fields.
Confirmed to also affect 1.16.0.64
I have checked the file of ice plain biome and ice mountains biome, and I found that there is a 'frozen' tag in this file, which controls the spawning of the strays, but no 'monster' tag in it, which controls the spawing of the zombies, spiders, skeletons and creepers. As far as I am concerned, it must be a negligence to have omitted the 'monster' tag, causing there are only strays in the snowy tundra and snowy mountain.
Additionally, in Minecraft Java edition, hostile mobs, such as zombies, skeletons, spiders and creepers, can spawn normally.
Affects 1.16.100. Appears to affect snowy tundra, snowy mountains. & frozen river. Ice spikes. snowy taiga, & snowy taiga hills are fine.
Affects 1.17.40.21
Affects 1.17.30
Affects 1.18.0.22 beta
The issue is the biome is missing the 'Monster' tag which is causing all normal monsters not to spawn.
Strays look for the cold and frozen tags so they can still spawn, and are the only mob that spawns.
This bug is not fixed. ice_plains.biome.json still does not have the monster tag.
Reopened because my earlier tests were finding other mobs in adjacent biomes, not in the ice plains as I believed. I have replaced the coordinates in the description to avoid this. Please test at the new coordinates.
Confirmed in 1.21.44