Bees can't spawn at all on Minecraft server

im in a server runing 1.16.5 paper build 786. while making a automatic farm, i’ve noticed that bees generated naturaly, go in their nest never to be seen again. bees can’t come out of the nests, and when breaking the nests no bees apear. also i tried summoning the bees both with eggs and with commands and nor spawneggs nor /summon work. i even tried with a spawner and when putting the bee egg in the spawner, the spawner appears empty and nothing happens.

Does someone have any idea of what could be the problem with the bee spawning?

the plugins present in the server are: ClearLag, essentials and advanced enchantments.