CDJ 2000 NXS2 Cue button goes black while track plays for no reason.

Ive been playing in clubs every weekend on the NXS2 players with a rekordbox USB stick. One thing that I noticed every night is that the Cue button suddenly goes black while the track is playing and disconnects from the cue point that I chose to start with. I used to think it was the heavy bass vibrations, as the club did have issues with that and it did trigger the play pause button before, but the the same thing would happen in my home studio or at not bass heavy mobile gigs. Is this a glitch, or a player setting?