Monster Spawners can suffocate mobs
Mobs spawned with a Monster Spawner in their head will suffocate despite the Monster Spawner being transparent.
Steps to Reproduce:
1. Make a new Creative world.
2. Give yourself a Monster Spawner like so: " /give <player> 52".
3. Give yourself a Witch spawn egg.
4. Place the spawner one block above the ground.
5. Spawn a Witch under the Monster Spawner and notice it is taking damage.
Created Issue:
Monster Spawners can suffocate mobs
Mobs spawned with a Monster Spawner in their head will suffocate despite the Monster Spawner being transparent.
Steps to Reproduce:
1. Make a new Creative world.
2. Give yourself a Monster Spawner like so: " /give <player> 52".
3. Give yourself a Witch spawn egg.
4. Place the spawner one block above the ground.
5. Spawn a Witch under the Monster Spawner and notice it is taking damage.
Linked Issues
is cloned by1
TRASH-607
- Unresolved
- Open
- Unconfirmed
- Creative
- 13w09a MonsterSpawne Witch, bug mobs suffocate transparent
- 13w09a
It happens on me too!
is cloned by
MC-12242
is cloned by
TRASH-607


Hmm. As i thought, Mob Spawners are blocks and can suffocate mobs.
I have seen this in one of SethBling's videos.
Added a screenshot for the bug
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
Confirmed in 13w11a.
Confirmed in 1.5 and 1.5.1
That is because a mob spawner is only visually transparent, so it is still treated as a solid block.
Confirmed for 14w21b.