I think I've read the screen glitches is the channel hopping while in auto. There's a momentary black screen when the channel changes. I haven't pushed distance much past 2,300 feet- short range I know lol. But I do use windsurfers and I've found that old habits die hard. I use 2.4 custom channel 13 and 4mps. It just never fails me. I'm gonna bump up to 6mps though for a little better looking live feed, considering I don't push distance. I'm gonna give 5.8 another shot too. The very first time I tried it I got a disconnect warning within 200' from me and it spooked me so I went back to my tried and true 2.4. Regardless though, I always prefer custom channel to avoid screen glitches of any kind.
My friend who has the P4 (original) has those glitches so bad, that the GO4 goes back to the Home Screen. I'll try and set his radio to "Custom" and see if that helps. Should be interesting.