I have a Oneplus 6 and I've been trying to use different music players because I don't like Google Play Music.
When I first install a music player app, it works great, but after some time, the buttons on the player's notification stop responding to touches. However, when i press the notification itself (not the buttons), it opens the app, where I am able to pause or skip.
I've also noticed that whenever this happens, the music doesn't automatically pause when headphones are disconnected.
The annoying thing is that this happens eventually, regardless of which player I try. I've already tried Black Player, Pulsar, Phonograph, Pi and a bunch of others. Every single one of them works fine, then suddenly the notification buttons stop responding and the music won't pause after disconnecting headphones.