https://bugs.winehq.org/show_bug.cgi?id=45369
--- Comment #2 from Zebediah Figura z.figura12@gmail.com --- This would make sense if explorer.exe crashes; it'll try to start the winedbg crash dialogbut the latter will involve creating a window and thus starting another instance of explorer.exe. In that case creating the registry key HKCU\Software\Wine\WineDbg and setting the value ShowCrashDialog to 0 should work around the problem.
It would be good to fix this, of course. Could you please attach a log with +seh,+win,+explorer,+module?