Issue continues to exist in 1.2.2 on both XBox One and Windows 10. Mob outside house (witch) tracks player inside with no line-of-sight in Survival, and snowmen track Endermen who teleport into undiscovered subterranean cave systems to get away from the snowballs (stare at ground clustered around as close as they can get) in Creative (and probably Survival mode, but not tested).
Jameson York
MCPE-30412
Issue continues to exist in 1.2.2 on both XBox One and Windows 10. Mob outside house (witch) tracks player inside with no line-of-sight in Survival, and snowmen track Endermen who teleport into undiscovered subterranean cave systems to get away from the snowballs (stare at ground clustered around as close as they can get) in Creative (and probably Survival mode, but not tested).