Left jogwheel only shows "Deck 2" - no info/artwork

When I load two songs onto deck 1 & 2 in my Rekordbox on my Mac, the two songs load fine, play fine and waveforms show on the main window.

However the Deck 1 jog wheel screen just says "rekordbox" and "Deck 2" .... despite being deck 1. I can't change this to artwork, info, etc. It just stays stuck on "rekordbox" and "deck 2"

Is there a configuration/feature I've accidentally enabled here? Or should I be calling support?