I have the same problem with my Samsung Q9FN TV. The Prime Video freezes everytime whenever I access Prime Video and click on any title. The only way to get around this problem is to do a cold-boot of my TV each time. With all the other apps (i.e Netflix and others) I'm using Prime Video is the only one that I have problem with (freezing). What I have noticed was that the problem does get resolved by itself eventually if I left it on frozen for 10 mins and miraculously it gets unfrozen. I think the problem is with the Prime Video server hanging or it's waiting for something. I believe the Prime Video app or TV is not the culprit since it does get resolved by itself eventually if I waited long enough.
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