Hanniburger

This is happening on BDS too...

In order to get an affected world file to upload, I attempted to replicate this issue with no resource packs active and was not able to.

I tested on an Experimental - Holiday Creator Features enabled world, at a blaze spawner in the nether. The spawner originally worked fine even though I had resource packs on, and two friends joined my world who also had resource packs on, and it continued to work fine. The moment one of them entered the nether to join me, the spawner stopped working. 

We then tested with no resource packs. Spawner was working, friend joined, entered the nether (no resource packs on) and the spawner continued to work.

We then tested me again having no resource packs. Friend with resource packs on joined, spawner was fine. They entered the nether and immediately the spawner stopped working.

Players on a server I play on describe the experience that the spawners work when there are no other or few people on in the mornings, but as time passes and people start joining, the spawners eventually stop working. Another player described the spawner as working fine but it would stop as people joined/left the server. 

I recently took down all the houses in my village to make a trading hall, and all the beds are randomly spread out on the grass, no walls around. Same problem. They will go to bed and immediately as a cat runs by or a golem, or me, they fly off. These beds were originally placed in a row with one space in between each one, but I have since laid them out in different patterns (plus signs, scattering randomly, in a row touching, etc) and the result is the same.

This has literally broken the game for me, as village stuff was my "thing". I can't tell which villagers are in which beds, I can't count how many empty beds I have or how many villagers because when they're asleep they fly away almost immediately, and when they're awake, the visual image freezes in place for some.  I also can't tell who links to what workstation. The village is essentially just broken.

Passive mobs do the freezing thing too - trying to ride a horse is impossible because it will freeze and you can't find it to ride it/drag it or even tie it up. (Although I realize the animals may be a completely different bug issue...just saying.)

This is happening in our realm too. Villagers laying every which way, overlapping each other, and skittering around on their backs, outside of walls and everything. Clicking on/breaking the bed brings them back, and they wake up back at their beds.

Also, they freeze in place and appear not to be working/meeting, but I can hear them meeting, and crops are breaking and being replanted by invisible villagers. Also, passive mobs in the area freeze randomly as well, as well as the iron golems.