I haven't got my headphones today, so can't test.. I use Poweramp mainly to get "in the zone" when working. But I'm confident that everytime I get the issue I have been in an office environment where I run Poweramp with the screen off, pausing and resuming songs using inline controls when interrupted. Occasionally, when grabbing a coffee, I'll pause by yanking the cable and resume by plugging it back in.
I'm fairly certain that it always takes a few interruptions before the problem starts
My experience matches this above. I notice the issue when the phone gets really hot, then I see that the battery has lost a big chunk and the battery graph has taken a big nose dive.
I have to re-start the phone to return to normal battery consumption. I'd say 50% of the time it is fine, 50% it starts draining for no apparent reason. I cannot determine any common factor so far.
This is on an LG V30 using the hi-fi DAC. Android 8.0.0. Music on SD card using a fixed playlist.
Definitely Poweramp (or Poweramp combined with something else) causing it as I only recently came back to it from a different player and this battery drain started then and only occurs when listening to music.
(This is always with screen off using earphones).
This is from a very recent install of Poweramp. I did try clearing and reinstalling it and the problem remains.