I am also having the “…” issue with my TiVo. It’s been a while since I’ve streamed videos but based on the other comments I assume it started with the latest Plex server update (184.108.40.20600). I haven’t tried reverting back to a previous Plex version yet.
My TiVo is a Roamio (Series5) with software version 20.6.3.RC15-USA-6-846.
I’ve attached the XML for the video that has the issue. I haven’t tested any others yet but can, I can also try to recreate the issue with logging if needed.
One other thing I did note – the video wouldn’t DirectPlay/DirectStream, it kept thinking it needed to transcode to a lower resolution (the video is a 1080p mp4, and it insisted on transcoding to 720p). My TV is 1080i and the TiVo normally outputs to the TV at 1080i, and I’m pretty sure most of my HD videos used to do DirectPlay without any transcoding (although now I can’t remember 100%). So this might be new/related?