Mobs no longer see buttons as full blocks and thus won't walk off edges.
Mobs no longer see buttons as full blocks in Bedrock Beta 1.16.100.55. This is likely due to improvements to mob pathfinding. Here's a video I made demonstrating the bug: https://www.youtube.com/watch?v=3Ek140awEaA
Existing mob farm designs rely on buttons to improve the efficiency of drop shafts, and this no longer works in the Beta. This a behavior that has existed in the game for years.
Player Expectation: Mobs see a button placed on the side of a block as a full block and pathfind over it, falling into a gap.
Game Behavior: Mobs avoid pathfinding onto buttons placed on the side of a block.
Consequences: Players spend days or weeks building multi-layered mob farms in their worlds and depend on the button mechanic to make these farms work. In the beta, these farms no longer work and players will not know why.
Suggested Change: Mobs should treat buttons placed on the side of a block as full blocks when pathfinding.
Precedence: The impact of this bug is similar to previous changes to slime chunk locations and pressure plates that were reverted because they broke existing farms.
Linked Issues
is cloned by1
is duplicated by5
relates to5
MCPE-44575Some mobs cannot pathfind their way through buttons below them and jumps when they are chasing somethingFixedMCPE-47075Mobs Won't Pathfind Over Short Blocks (Slabs, Soul Sand, Enchanters)FixedMCPE-88389Avoiding mobs not pathing over buttons, signs, and trap doorsWorks As IntendedMCPE-114407Mobs pathfind on dead coral fansConfirmedMCPE-153897Buttons no longer block spider spawnsFixed
![[Mod] GoldenHelmet](../../../data/avatars/users/18951.svg){kind=small}
Created Issue:
Most Mob Farms are Broken due to Changes to Pathfinding
Mobs no longer see buttons as full blocks in Bedrock Beta 1.16.100.55. This is likely due to improvements to mob pathfinding. Here's a video I made demonstrating the bug: https://www.youtube.com/watch?v=3Ek140awEaA
Existing mob farm designs rely on buttons to improve the efficiency of drop shafts, and this no longer works in the Beta. This a behavior that has existed in the game for years.
Player Expectation: Mobs see a button placed on the side of a block as a full block and pathfind over it, falling into a gap.
Game Behavior: Mobs avoid pathfinding onto buttons placed on the side of a block.
Consequences: Players spend days or weeks building multi-layered mob farms in their worlds and depend on the button mechanic to make these farms work. In the beta, these farms no longer work and players will not know why.
Suggested Change: Mobs should treat buttons placed on the side of a block as full blocks when pathfinding.
Precedence: The impact of this bug is similar to previous changes to slime chunk locations and pressure plates that were reverted because they broke existing farms.
Attachments1
![[Mod] Urielsalis](../../../data/assets/gravatar/urielsalis.jpeg){kind=small}
![[Mojang] Mega_Spud (Jay Wells)](../../../data/avatars/users/92696.png){kind=small}
![[Mod] OcelotOnesie](../../../data/avatars/users/43220.png){kind=small}
is duplicated by
![[Bot] Arisa](../../../data/avatars/users/43007.png){kind=small}
is duplicated by
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Most Mob Farms are Broken due to Changes to PathfindingMobs no longer see buttons as full blocks and thus won't walk off edges.
is duplicated by
relates to
![[Mod] Greymagic27](../../../data/avatars/users/92875.png){kind=small}
relates to
is cloned by
relates to
duplicates MCPE-49772
this is already resolved in the beta versions, however there is a bug report intending to revert this specific change: MCPE-99698
Thank you for your report!
We're actually already tracking this issue at MCPE-99698, 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
Thank you for your report!
We're actually already tracking this issue at MCPE-99698, 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
Thank you for your report!
We're actually already tracking this issue at MCPE-99698, 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
Thank you for your report!
We're actually already tracking this issue at MCPE-99698, 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
That creeper farm design uses buttons to get creepers to fall. That no longer works due to other bug fixes; see MCPE-99698.
Coral fans have been used in mob farm designs as a replacement for buttons since the change that created the issue reported at MCPE-99698, so a change to this behavior would potentially have a large impact.
Please don't mark it "Resolved" so quickly. Jay requested an original bug report on the breaking of Mob Farms: https://twitter.com/Mega_Spud/status/1303087436004823046
Reopened
Thanks, Urielsalis.
I really feel like this is similar to the recent changes to collision boxes for pressure plates that broke certain farms and were reverted.
MCPE-80276I think it is important to discuss if any of the improvements to pathfinding have unintended consequences that should be addressed or not. This is a mechanic that has been in the game for a very, very long time and well established mob farm designs are impacted by it. It is smart for the developers to consider the impact before finalizing the change. If needed, we can post lots of tutorials and let's plays from YouTube that use this mechanic.
Also, I want to make clear that I am specifically talking about buttons here. The other blocks that were updated in connection with buttons are not used in pathfinding-based farms as far as I know.
You can resolve this ticket and the related button pathfinding issues by let mobs only pathfind across buttons placed on the sides of blocks. This will not affect how mobs interact with buttons place on the top or bottom of blocks.
There is precedence for what Reed suggests in the comment just above, in the fix for
MCPE-81316. That issue was fixed by changing the effect of collisionless blocks on a boat when placed on top of the ice the boat travels on, without changing the effect of those blocks on a boat when they are placed on the side of the ice that a boat travels on. So now blocks like buttons and torches are handled differently when in the same block as a boat than they are when in the block below. Doing the same for buttons and pathfinding could fix the issue reported here while preserving the fixes toMCPE-47075andMCPE-44575.See Precedence for differential handling of collisionless blocks attached to tops and sides of full blocks.mp4
for what I mean.
Happening again. All of my mob farms that use buttons on the side of blocks so mobs will pathfind across them stopped working after the latest hotfix.
PS4
This is still an issue for me in 1.16.200 on Windows 10 edition. I used this design: https://www.youtube.com/watch?v=9G2hpEVuXXM
Is this going to be fixed or do I need to rebuild my creeper farm that I spent weeks building (from build height to bedrock)?
I think this is a parity change. Don't open trapdoors work the same?
Affects 1.17.40.20
This is a bug not a feature just use coral fans they reverted the change they made that made mobs don't treat coral fans as full blocks.
This was fixed with the fix for
MCPE-153897.