Music controls stopped working

Not sure if this is an issue with watchOS or iOS 11, but since I’ve updated to the beta my watch’s music controls have stopped working.

The next/previous track, shuffle and repeat buttons are greyed out and don’t work. Anything playing on my iPhone doesn’t update on the now playing screen, or any of the complications.

I’ve unpaired and repaired my watch, updated it to the latest watchOS, and this is still going on. Strangely the now playing app continues to work fine. Has anybody else seen anything like this or know of a possible fix?