Avid Artist Control w/ 11 Pro - Last encoder not responding

Hi. I’m on a new M1 Mac mini and Cubase 11 Pro. My Artist control works pretty much perfectly with Cubase with the exception of the bottom right soft knob. It’s working just fine in the hardware test, and all of the other knobs respond as expected.

If it wasn’t so frequently needed to use the channel strip properly, I’d probably just say whatever, but the bottom right encoder controls input gain on all the compressors, saturation on Magneto, and the high shelf on EQ. Any ideas where to look for problems???