can not 100% confirm it is minecollonies but the game crashed after sleeping (or rather on wake up) only once i had started a town (and initial villagers had spawned)

crash-2021-07-26_20.28.52-server.txt

Not really sure how that would happen since i was purposefully avoiding that... in some way easy fix for it though, but i you made me look at that code and i noticed other issues with that :p