I also confirm that I have the green/pink screen every once in a while. I updated my GT1 with the firmware provided here but the problem remains. I click on 1080p-60hzrgb but the small ball which shows the selected resolution does not move to this selection. Anyway I clicked on this option, it played fine for a while and then green/pink was back again .... :'(
I installed this update via OTA today, and now my Beelink GT1 REFUSES TO SHUT DOWN :'(. When I choose to power it off, the light goes off and then immediately the box powers back on. Sleep function seems to work OK (nice touch with the delay) - but it keeps powering the USB hub, so it does not work for me. Anyone else with this issue?