So in the last few days I've noticed a behaviour I've not seen being persistent before: a video I'm watching (potentially Premium-only, as I've noticed it happen in several of those videos but maybe I'm not remembering every instance & I've not watched many non-Premium videos in the last few days) stops playing and when I tab over to that page (I have it Picture-in-Picture so the page is not in-focus) then it's showing the "next video" option (clicking the play button loads the new page for the next video) but I had definitely not reached the end of the video.
When I go back to load the page for the video I was watching then sometimes it remembers where I was in the video but other times it has not resumed & restarted from the very beginning of the video. This seems to be totally inconsistent (I've had both things happen for the same video - as this happens often enough I've had it happen several times while watching a single video). It also isn't a set point in the video being buggy as it's happened at various points rather than consistently failing as a set place in the video file.
Maybe something going wrong when the video player tries to grab the next chunk of video rather than buffering correctly as it waits?
Definitely happened to me several times while watching: Going Rogue - Part 01, Playdate: Mahjong Mornings III.