Sylvain Vernois

_Note for the previous poste_r: thanks for trying to help but it seems you're playing the java version (F3 debug, optifine) but this issue is for MCPE (Bedrock): spawning rules are not the same.

For the records: playing on my realm since last 1.4 update (on Windows 10), mob spawning seems back to normal at sea level in the overworld (my main house: lot of zombies, skeletons, rabbits…), at level 0-60 (my ocean monument: mobs do easily spawn in low light area) and in the Nether (wither skeletons and blaze are naturally spawning again).

Spawning rules are indeed not the same than "before" but seem to be finally working for me. The "not despawning" rule when too far from the player seem to be the last bad behaviour. I hope you'll observe the same thing… or am I lucky ?

Things seem to be solving by themselves, I can now reach the "unreachable" zone.
I did nothing but trying to get there from different orientations.