Where is this battery draining code from?

I had some odd issue a week or so ago where my Bangle lost a bunch of charge very quickly (I woke up and found it almost flat and on the messages list screen) and I was pretty sure that in that case the backlight had got stuck on.

So it's definitely worth checking to see if podcast addict keeps the screen on - if it's constantly getting notifications from Gadgetbridge I guess it may well be keeping it on?