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Minecraft version: 1.12.2
Wizardry version: 4.2.1
Environment: Server

Issue details: [I was minding my own business and mining in underground till i heard explosion somewhere and suddenly server crashed.]

Other mods involved: [No clue]

Link to crash report (if applicable): [https://pastebin.com/rxEfDxKi] I hope this can help out what actually happened. I was suspecting this mod as it was mentioned in there.

Same issue seems to happen now and server is unplayable due to this strange bug, as it keeps crashing every time when i log in. If possible, i'd ask a possible quick fix for this?

I have a similar crash with what you are logging here, except i got this by purely messing around in Creative mode with wizard fights.

#188

See my comment on #188. Thanks for reporting.