1. Device: ASUS ZenFone Max Pro M12. ROM: Stock Android 8.1.0 3. Why it should work (and actually works): https://4pda.ru/forum/index.php?showtopic=898479&st=3300#entry78306546 and my personal experience with Hi-Res Output. My headphones also support Hi-Res Output.
Here's a problem: reconnecting my wired headset drops sample rate/sample format from selected 192kHz/24-bit to 48kHz/16-bit. Please, fix that. I'm tired of reconfiguring my Poweramp almost every time. By the way, sometimes it just switches to OpenSL ES Output (though Hi-Res Output via headset option is still marked as a selected one).
Someone already posted a similar report,
but got no replies. That is very disappointing.
P. S. Your app is a sheer masterpiece. Really love it.
P. P. S. I'm using the latest version of the player.
UPDATE: I have found a quick solution: you just stop the track, close the player and open it again with your headphones plugged in. But that doesn't satisfy me. I paid for this app and I want it to work properly (don't want to be a jerk, just willing to help you to improve your great player).