In the last week, my wife and I have been experiencing random crashes in the game. No error messages or warnings, just kicked out. I ran WoW Classic from the command line and got these errors reported:
free(): invalid pointer
01dc:err:seh:call_stack_handlers invalid frame 0000000003B6DEC0 (0000000003972000-0000000003A70000)
01dc:err:seh:NtRaiseException Exception frame is not in stack limits => unable to dispatch exception.
021c:fixme:wtsapi:WTSUnRegisterSessionNotification Stub 000000000001008A
021c:fixme:kernelbase:AppPolicyGetProcessTerminationMethod FFFFFFFFFFFFFFFA, 000000000011FD70
I am running WoW through Wine on Linux (version 8.0), but I know other Windows users who are also having similar issues. Hopefully this helps.