Battery drainage due to malfunctioning suspend: Pinephone keeps waking up (added: when SD card is inserted)

Describe your issue

Since a while my phone does not remain in standby: For some reason (without any messages coming in etc.) the screen switches itself on and either the lockscreen (with time, date, connections) is visible or the screen is black, but on (i.e. not switched off, but actively displaying a black surface, as you can tell by the glow).

Expected Behavior

In the past, my Pinephone (Mobian) could always remain in standby for more than two days before the battery was empty, provided I did not touch it at all. This is still the case with my other Pinephone, which at this very moment still has 44% of its energy after being on for 30 hours and 7 minutes.

Observed Behavior

See above. The constant waking up brings battery life down to a few hours.

Specific area or package affected

Both phones have the latest Mobian packages installed.

How reproducible is the bug?

It happens constantly. Other users have experienced this as well. It seems a bit similar to the problem described for the Pinetab.

What device are you using?

PP 1.2 3GB

Which mobian repository are you using?

deb http://repo.mobian-project.org/ bookworm main non-free

How did you get your Mobian Image?

https://images.mobian-project.org

Solutions you have tried

Tried different options in the Power/Privacy options: screen blank after 2 minutes, automatic suspend on, no notifications on lock screen etc

Additional Information

Happy to provide any logs or whatever that might be useful.