The truth is, in my opinion, that this issue concerns only the HLG contents at 50/60 hz that, at moment, only a few of broadcasters are using. Watching by built in apps or blu ray Hdr or Apple TV the problem doesn’t exist. A lot of people, then, don’t know well what’s viewing. I read about someone which, non satisfied about the vision in 4k, switched in hd because is better! In my opinion all the oled lg 2017 are affected by this issue. Unfortunately there’s no way to downgrading, not approved way at least.