Ah... it wasn't a debug so to speak. It was a workaround.
Gotta turn all knobs to 0. And leave them there. The channels/settings wouldn't run anymore.
If you need to tweak, just turn the knobs to the settings you saved, the LED would guide you.
The problem will still be there though, and appear when you have any knob above 0.
I brought up the issue to Randolf before, I don't think he was able to just debug it like so, but best to recheck with the dude.