This has only happened on one occasion so far, but the MainLR outputs on my CQ-18T died completely after coming back from a 15mins break in our set. Inputs and monitor outs were working perfectly. A quick reboot of the mixer sorted it, but the musicians were shooting daggers at me as they had to reconnect to the wi-fi and then their CQ4You apps on their devices, which again ate up some time. A little embarrassing.
Has anyone else had this experience