Sadly, the issue is still here. I looked into var/log for any hint but found nothing I could understand. I will need to shut down every evening to avoid this problem for the time being.
Update: Actually, it got worse, since the problem is happening more frequent. Although I did open my workstation to clean it a month ago, I don’t suspect a hardware issue. I went to settings and turned off Automatic Suspend. Curiously, I discovered a new Power Mode option set at “Balanced Power” that I switched to “Performance”. I also turned off a couple of shell extensions for the time being. I will suspend the workstation manually (as I used to do), and see what happens.