I just purchased a g50 3 weeks ago from guitar center. I am also having this same issue. Today I had at least 1 drop out per song in a 7 song set... and being that this is my job it's more than just annoying.
I am using the supplied power and I also went through the process of scanning for interference to no avail. I have tried both Hi power and Low power... I typically run it at low as it's right on my pedal board in front of me. I have tried it in different venues in the past 2 week with the same results (random drops) as well as taking my pedal board out of the signal chain and just gone straight guitar -> Relay -> Amp which seemed to produce "less" drops but it still dropped.
Flying back home tomorrow and will be taking the relay off my board and returning it on my 3 days off unless I can solve the issue here.
Thanks for all the feedback everyone!