Allay Despawning or Wandering of in Spawn Chunks Multiplayer server

Put the summary of the bug you're having here

What I expected to happen was...:
Allays should be where I logged out.

What actually happened was...:
2 allays were gone when I logged back on to my private server. They where there when I logged off

Steps to Reproduce:
1. I captured two allays near my spawn
2. Went back to my spawn chucks, where I'm starting my base and logged off.
3. About half an hour later I logged back on into my spawn chunks to see them missing