So, I have had this problem on my CODE 50.
I turn it on, plugged my guitar in it, everything normally, but after some seconds or minutes playing, it just get muted on!
The funny thing is that the Bluetooth keeps working on... I tried to eliminate some bad connection but I never found one. My cable is good, my guitar is good too... I don't know, it maybe could be a board problem or a electrical/power supply fault...
The Amp and display are up to the date, firmware 1.47.
Please any advice is welcomed
Sorry you seem to be having issues, we would suggest the amp is looked at by an engineer. Please contact the shop where it was purchased and they should be able to help with this.