Just like the title says. This happens on both ios and tvos testflight betas.
Used to be able to scroll ahead on a virtual channel and select a program and watch the item using the watch button. This no longer responds.
To narrow things down, I went to the release TVOS version and verified that it still works on the release apple tv version, which I hardly ever use.
Something seems to have broke in the beta versions?
I hit the watch button, got no response, and then submitted diagnostics from the testflight beta just now. Hope it helps.