A huge issue my boyfriend and I faced was that renaming a mob (or at least in our case the Tasmanian Devil) causes a server crash and the "Stock Overflow Error" aka a ticking entity and the server becomes unplayable. We had this issue before and had to restart our world from scratch but just a warning to anyone out there. To fix it we had to kill our beloved pet within the 30 or so seconds the server gives us before crashing </3

Can you attach the crash report?

(We fixed it by killing him but this is just a heads up to anyone else), also sorry that’s all I can show because I’m not the server owner so I don’t have access to the console(he only sent me that one screenshot of it)

It'd probably be more helpful for solving this issue to attach the actual crash report file if you can do that.

performant issue