Shift button sending CC messages

I just got a new MiniLab 3 and while playing around with some stuff I noticed that pressing Shift would alter the sound. After some debuggingI learned that in both the Arturia and DAW programs the Shift button will send a CC message , which just so happened to be mapped to a resonance in the synth I was using. This is what I found Shift is sending for each program:
Arturia: CC 9
DAW: CC27

I know I can create my own template that disables that, or just disable the MIDI mapping in the synth. But it seems weird that a button that supposedly only controls the hardware would also alter the sound.

Is this by default, or a bug?

Thanks!