I’m having the same issue.
when I turn the volume up and down to the 2nd PC 112 plus.
it cuts out and loses signal.
I ruled out the amps by reversing the 1st and 2nd PC+.
same results.
very frustrating.
only the 2nd cab loses signal.
Hope to hear a solution from line 6 soon. I got the helix and two PC+ 112’s to simplify my live situation and keep some control on stage.
this doesn’t help.
Plus it’s a big investment.
Both money and the time invested trouble shooting, learning curves, hours of you tube tutorials for on line 6 products.
only to be halted by a bug in the powercab.
