In T189923#2775101, @oldmann1991 wrote:

we found a way to stop the crashing. we have removed all the revolvers (No matter If modded ones or the Vanilla one). Since that we dont have issues anymore. Try it maybe it will help you too. BUT we still have other fsm errors that are not related to the
revolvers, those dont crash the server.

What more info is needed so this can be looked at and addressed?

Having the same issue since 1.27 hotfix update{F5114147}