I’m running a Paper server 1.16.4 and noticed some strange behavior as I was building a monster farm.
When I am standing directly underneath the spawn platform (which is at y-level 199) within 32 block vertical distance (e.g. 30 blocks under the platform), entities spawn on the platform and drop down and die - as it should be. If I am slightly further away (e.g. 34 blocks) entities still seem to spawn above me (looking at the F3 debug output), but the number keeps increasing and only rarely a mob falls down. It seems as if they spawn but then don’t do much.
My hunch was that this has something to do with entity-activation-range, which was originally at 32. But even after increasing it to 64, the behavior does not change. Is this expected to only affect newly created worlds after I change it? On server startup, it reports 64 now for my “standard” world, where the mob farm is located.
I’ve played around with all the mob-spawning settings I could find, but nothing seems to change anything here. Am I missing something? Can someone explain this? I’m out of ideas…
Thanks in advance, have a good 2021,