Pixel XL, Android 8.1.0, Power Amp 2.0.10 build 588. Paid version. Pulling down notification bar used to show a player with back, forward, play/pause buttons & song art. Problem starts by not working in landscape mode and then stops working in portrait mode too. Basically only the album art is shown. The player buttons are not displayed (area stays white). When I click on the area which was supposed to have the buttons, I see a ghost image of the buttons appear and then disappear, but they are nonfunctional nevertheless. I would like to use the notification bar buttons to play pause move to the next song while doing other tasks such as using the web browser. So this feature is absolutely essential.