Bluetooth music playback

I am having playback issues with my android s10 and my Q7 mmi system. 

having bought the car in the last couple of weeks I have discovered that the Audi connect features are not all available on my 2106 model q7 so a lot of the functions on the 'my Audi' app are not active. whilst this is not a problem, I do use bluetooth heavily for calls and playing spotify. 

everything is connected as it should and despite working perfectly fine on the day I picked it up, it now stutters when playing media from spotify. sometimes the track will jump a second or so to catch up, but continues to jump around. not every time, but certainly enough to cause a nuisance. 

I've cleared the cache on the phone and deleted multiple times to no avail. has anyone had any experience with this type of problem before? 

voice calls are working as they should.