Power amp volume drops

I´m having problems with the Power amp output of my Kemper Rack.
Playing live with a guitar cab ( Mesa Boogie vertical 2x12 ), out of nowhere the volume drops a few, then recovers a few or more minutes later , randomly. i have to adjust Master volumne and concern the entire gig. Also at home usually does happen, but i work every week with the Kemper live.

Does anyone have the same problem?

i already switch cables and cabinets, same happens.

I also notice that the Master Volume knob ( o to 10 ) it´s not always accurate. sometimes it´s in 0dBs and still have sound, push it to 10 and have low volume ( if you swing up and down several times the Master volume, it get´s always like this ).

i´m using the 4.0.6 from July 7. i´m updating right now to the latest, but this problem does not appear in the fixed problems in ReadMe 4.0.6.pdf..i´ve been having this problem for a while (doing all updates) , maybe since i bought the Kemper.since is a random problem, only months after i notice it.

ok, update done, same problem...

you mean the link below your comment? to Kemper official support? ok, i´ll do. I already thought in that, my fear is to sent it for repair.. i need this all-time favorite peace of gear every week!
Thank you!

maybe the power amp switches for different Ohms values with no reason..or it´s just another issue.

ok! thank you all!

no, still have this issue...