Yes, I noticed the same thing on recent rehearsals. Volume is shifting up and down. I’ve had my QC since april 2021 (Preorder) and I don’t recall having this issue before.
I had the same issue about 2 years ago. I sent the unit in for repair. I was told the they replaced something (output board) can’t remember exactly… Was fine for 2 years until last night when volume cut in half in the middle of the set. I compensated by boosting my power amp onstage and bringing the guitar fader up in front of house only to have the QC volume jump back up a couple minutes later. Causing my onstage and FOH volume to go through the roof. I do run my QC level at 100%… Not sure what’s causing this now, but it’s really unusable like this.
I’m experiencing the same issue as you. The problem doesn’t lie with the volume encoder that everyone keeps discussing; rather, it’s about sudden drops in volume without any percentage changes appearing on the display. The volume doesn’t fluctuate; it just stays consistently low. The encoder itself functions perfectly, it seems there’s a software glitch causing these significant reductions in volume. To restore the volume to a normal level, you’ll need to switch to a different preset.