I have the latest beta of 13.4 (17L5251a) and I just restarted my Netflix account. I can not get anything above 480p. I noticed trying to play a couple videos that the quality was very poor, then I ran the Test Patterns video where it shows your streaming stats and I'm only getting about 560K - 1750K or so at 854x480. My connection is fine (65 Mbps or so), and all other apps stream fine. I just tried Netflix support which was a total joke. I'm wondering if there's something screwy with the latest beta of tvOS and their current Netflix app. Just curious if anyone else is having an issue.