I'm having an issue with the Spotify app for Android.
I recently tried connecting to a pair of Nocs airplay speakers (over airplay) and everything worked fine (including volume control). After syncing to the same speakers over bluetooth however, the volume rocker on my phone stopped working and the volume is fixed. The system volume slider marked bluetooth does respond, but the actual audio doesn't. Instead, the music, like I said, is played back at maximum volume (or at least very loud). When adjusting with the software volume controller in Spotify however (accessed from the speaker icon, see photo), the volume does indeed change and so does the onscreen system volume slider.
Anyone else experienced this? Why does it happen? Is it a bug?
Btw: I've got the latest version of Spotify, and my device is a Sony Xperia Z Ultra. I've checked with multiple other speakers to make sure the problem lies with Spotify and not the speakers. I'm also using the latest phone software, no other apps are open, etc.