On my old phone I had an issue with the proximity sensor and front facing camera. This led me to holding my phone backwards to take photos and being unable to hang up phone calls.
I think I put up with this for a year and a half.
I did end up figuring out the issue with the proximity sensor but opening up my phone to reconnect the camera module was too much effort for me.
I don’t know why your Spotify was pausing! Just thought I’d share my experience, in case it helped you or someone else researching this in the future.
I can’t tell you how many times I have been saved by finding a 2 year old forum post with the same issue that I was having.
Man you’d think they’d put in some kind of “Music started on X device so we’re stopping it here” message for your scenario instead of making you sleuth it out like Mulder and Scully