Hi bretherens,
Im still at CorOS ver 2.3 since I’m having issues w/ the updating my QC on wifi, Anyway, i had a few gigs this month where I started experiencing this issue, my input 1 on my QC just stops reading any guitar signal, my input 2 (which has my vocal mic plugged in) is still reading the signal but my input 1 just stops working, the 1st instance it happened, I panicked, thought it was my guitar or my cables, Swapping 3 cables on our setup time was just a nightmare,after like 10mins. i tried rebooting the QC and it started working again, we all know how long the QC starts 
. the 2nd time it happened, was in the middle of a performance, it’s just a fucking nightmare. I was able to get back half way of the song by unplugging and replugging the power, I’m posting this to confirm if there are any other users experiencing this issue.