The bug
Elder guardian spawn on ocean monument pillar and suffocate.
How to reproduce
Create a buffet world of deep ocean
locate a an ocean monument
/locate monument
Found elder guardians
→ ❌ one elder guardian spawn on a pillar and suffocate.
Elder guardian spawn on ocean monument pillar and suffocate.
Create a buffet world of deep ocean
locate a an ocean monument
/locate monument
Found elder guardians
→ ❌ one elder guardian spawn on a pillar and suffocate.
Might actually be an older bug, which got apparent because of MC-165660. Might be that elder guardians used to pathfind out of the pillar.