I had to change my game difficulty to peaceful today, to turn off mob spawning and put it back in normal mode. All looked fine until I flew over to another chunk and saw none of the mobs had despawned, although I did put it in peaceful mode. Sorry, no pictures because pictures can´t show what I mean
MC-64669
Difficulty settings
Resolved
Invalid
0
If the chunk you are talking about was not loaded when you switched to peaceful and back, mobs won't get removed. Switching to peaceful and back again will remove them. This will be the case for every chunk not loaded.