This has been happening to me also. Seems to have started after last android update only when connected to a Bluetooth device. When I pause or do next, track keeps playing on speaker, and check app and buttons grayed out. I can either force stop or wait for next song and have the buttons back and they seem to work. Something with the Bluetooth is out of whack. I cleared both cache and data, logged back in and same symptoms. Pandora v. 2310.1 (android player 23101040)
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