FP4 randomly wakes up the screen

So I have noticed for some time now that my FP4 will at random turn on the screen for a few seconds many times a day which means that a lot of battery is wasted on the screen when I’m not even using the phone. Does anyone know if that is a setting that needs to be turned off or is this a bug that needs to be reported to FP? Yes, I do have the Don’t wake up screen checkbox ticked in the the DnD settings but I don’t usually have my phone on DnD mode so I don’t think that is doing anything

I suppose this happens when one of your app sends a notification.
Information how to stop that can be found e.g. here:
https://www.howtogeek.com/724003/how-to-stop-android-notifications-from-turning-on-the-screen/