Solved KDE login hangs with circle stopping on FreeBSD 13

I just found that the problem in my case is to start in full screen mode. If I exit from full screen and reboot, LXDE works.

Then, I can reenter in full screen mode without problems. I can even reboot, it still works (although the resolution is 1920x1020 instead of 1920x1080). But, if I power off the VM and start it, I get again a black screen.

I will stay on legacy version until this bug is fixed, if it's fixed a day.
… hangs after login. …

This seems to be a transient issue.

Symptoms are not limited to KDE, and the original issue here was solved, so please join me at: