Having same issue here all of a sudden. Samsung firmware is up to date since late 2018, Netflix and Hulu have no issues. This is an Amazon Video issue, not a TV issue. I tried the recommended steps (De-register, register TV again) nothing is working.
Can we at least get an acknowledgement from the Amazon team that you are looking into this?
Based on the only response it doesn’t seem like they are taking it seriously.
I have also a 8 year old Samsung TV not a smart one and runs fine so obviously it's the amazon smart TV app which is the problem it would be nice if amazon update us what's going on instead of the standard answers as turn off hub , switch TV off for 3 minutes etc blah blah it's been over a week and nothing has happened from amazon end.
I am also having same issue with Samsung TV. Suggestion from Amazon did not work. Called Costco as well, they know about this issue but no one has any solution. Hope amazon find something soon, its very annoying.
Having the same issue with Samsung Smart TV, model UN65KS9500 running most up to date software v1233. Tried updating tv software and re-registered and re-registered. Can't do anything to unsqueeze the image. Please fix this issue ASAP.