Works for a while, then not waking up again

[dm1x]

Cheers,
just set up a fresh MagicMirror on a Raspberry 4. As cam i‘m using an USB camera module with an OV3360 chip. If needed, i will post a link to the cam.

The problem I have is, that it works just fine for a while (~1 hour). When no motion detected, display goes off and back on again when motion is detected. But after a while it doesnt switch the display back on.

When connected via VNC to the mirror the mirror runs normal (using MMM-scenes, it keeps switching pages).

I also can turn the display back on with vcgencmd display_power 1 via ssh. Plus, after ctrl+R to reload the mirror, it still doesnt detect motion, as if only the USB port/cam is frozen.

Any help would be appreciated. Thanks

Edit:

• the camera is then still listed under lsusb
• tested all USB slots, same issue
• it seems like the raspberry saves the display_power state: it shuts down automatically on a specific time. When starting up again at the next day, display_power is still off. Only after a few reboots it goes back on. Any solution for this? I thought about setting display_power to 1 before shutdown.