What if all the tracks are unmuted (all Green pads in Mute Mode) and the ‘Mute LED’ is still half-lit? What could be keeping it (half) on?

edit - Sorry to bring up an old thread, but this is exactly my problem and although it’s small, it’s bugging me somewhat.
I am playing around with using a LaunchControl XL to adjust parameters in the AR, could it have inadvertently tripped a switch somewhere?