Describe the bug you're experiencing

one of my loyal players got a dungeon map and placed it in a map device. each time the place it in the map device they crash out.

Reproducability

place a map into a map device, where the map has an invalid id.

Mod up to date

• Before submitting this issue I updated to the newest version and reproduced it

Tested Without Custom Mine and Slash Datapacks

• In case I used Mine and Slash datapacks, I ran Mine and Slash in a new instance without custom datapacks and confirmed the bug still exists

Mine and Slash version

1.12.2-1.9.7

Logs

https://gist.github.com/kreezxil/3a60f11ebd2551c0ca3028c042ca9a0c

1.12 stopped being supported for.. about 5 years maybe?
Though..try this: use a real server, not LAN

Second, purely for my amusement, explain this
Loading dimension 2 (KURVA) (net.minecraft.server.integrated.IntegratedServer@182b5b7)