Automatic program closure after session lock

Hello,

I recently installed Windows 11 (after a clean install of Windows 10 + immediate OS update).

Overall it's stable except for the resume after lock screen or screensaver.

In short, the open programs close automatically after resuming from a session via password, or simply after a screensaver.

Sometimes it's my AMD graphics driver that disconnects and then I have no image, so I have to reboot the machine.
Sometimes the machine also restarts instead of resuming.
The problem occurs often, but not every time.

What I tried:
- reinstalled the graphics driver
- adjusted power options: hybrid sleep, sleep after, etc...
- other things I can't recall right now

Note that this phenomenon only happens after a screensaver resume or locked session resume, never during activity.

It's a newly built PC I assembled myself; the motherboard is a Gigabyte if that helps.

So if you have the same problem or any suggestions, I’m all ears.

Thanks