Sound quality decreases after phone call

[CaptainRIOT]

Hello!

When I listen to spotify and receive a phone call the sound quality is pretty bad after the call. Mostly the bass is almost totally gone. 

This happens on my bluetooth box and in my car. 

No other music apps have this issue and after I restart Spotify the sound is normal again.

Android phone and Spotify are up to date.

Is there a fix for this?