Just some background - I've had this TV for almost a year now, no problems. We've had a Switch hooked up to it for about a month, no other devices hooked up to it. 

Two days ago certain streaming apps started to show a constant flicker. I *think* there may have been a firmware update (it's on 2101). Currently the flicker occurs in Amazon Prime Video or Disney+ but only with some content (tested Hawkeye, Book of Boba Fett and Wheel of Time tonight - all flicker, Yellowjaxkets didn't).

I have no issues with Samsung TV, Netflix, Hulu or YouTube so far. I can't find anything in the settings that had an impact. Self troubleshooting menu, everything displayed fine for the various tests. I don't think I missed anything. A solution would be great, but I'd settle for a way to rollback the last update and fix this issue.