Everything is up to date. Latest MacOS 11.4.
Crashes occur all the time, if I have multiple Archicad projects open, a project that was a while in background will crash when activated. And crashes when saving, dragging, going to 3D, publishing etc.
And yes, I always send a bug report.
And I followed it up to the local reseller, its a Archicad-AMD radeon Bug. And their workaround was changing a few settings in some .plist files. Did not work for me. I've got this problem for months now, I'm going crazy, constantly crashing and reopening the crashed files.