Minecraft wiki entry for Development_versions, associated text: Vindicators can now path correctly over carpet during raids.
The wither no longer plays its spawning animation when reloading a world. (MCPE-32415)
Mobs no longer path-find over brewing stands.
Mobs now spawn on double slabs. (MCPE-30765)
Mobs no longer get stuck when pathfinding on ladders. (MCPE-43034)
Evokers no longer move too fast in "move to village" goal.