Was fighting Illigers on a server when this happened
https://pastebin.com/NbLh67EK

Oddly enough, I wrote a script to prevent exactly this kind of thing from happening, guess I recently broke it somehow.

It's happening because the Bee's revenge target is getting set to nothing / non-existent, and the Bee's revenge AI is trying to check if the revenge target is on the same scoreboard team as itself. Since you can't check the scoreboard team for a non-existent being, the game crashes.

It should be relatively easy, just requires some debugging as to why the current fix is not preventing this from happening.

Would you mind updating the repo to latest version so that I can compile a jar that disable bee spawning for my own server for now?

Latest version on Curseforge has fixed the issue.