Strange Fader Behavior w/ 1.5.11 on SQ-6

We recently installed firmware 1.5.11 on our SQ-6. I noticed last night that if any fader is advanced past '0" there’s a step change in the output. Probably 5+ dB. It’s very noticeable.

I see there’s a procedure for ‘fader calibration.’ Haven’t tried that yet.

Any suggestions?

You can calibrate your faders by going to Utility → Calibration