Ellenoria

This is a two person bug. The spectator in question does not experience anything abnormal, but players nearby can hear extinguishing noises if the spectator was on fire before going into that mode, and then flies into water.

The screenshot provided is from the vanilla server, the bug is not visible as it can't be since the spectator fire is not visible to the players nearby

This issue feels like it's back in 1.15. Farmers will path to the composter after harvesting every crop and sit there for about 2 minutes before going back to the place they just harvested and staring at it. Current fix for it is locking their profession and removing their workstation in the farm. They will farm as normal then. 

I've had villagers especially just walk into a block and die even after the chunk had been loaded for a while
Confirmed to happen once as I witnessed it die and saw the death smoke from inside a cobblestone block.
I've lost about 10 other villagers that I suspect walked into a block and died. Zombie death would have been unlikely as there would be missing doors, uprooted land (whole village area is tilled), and I would have heard both the zombies and the turned zombie villagers (game set to hard difficulty).
In each case I was within 30 blocks of them and the game had been running for at least an hour, unlikely to be a chunk loading error

I was on a multiplayer server, so it could have been lag, but I thought I'd post it here just in case there was another cause to this bug than just chunk loading.
Edit: It was not player griefing, I was alone on the server and no one logged in while I was away. Just for clarification)