I recently started watching the 4K release of Seinfeld on my JVC projector. I did not see any problems throughout Season 1 but something strange happens with Episode 1 of Season 2. I noticed that the playback was jerky so I launched the MC status screen (Crtl-J). It shows multiple frames are being dropped every few seconds. When I play Episode 2 of Season 2, no frames are dropped once the playback stabilizes in the first second or two of the episode. If I flip back to Episode 1, once again many frames are dropped. I reviewed the file formats using MediaInfo on my MacMini but I don’t see anything unusual. Both episodes are 4K 24Hz video files.
I collected a logfile while playing parts S2E01 and S2E02. Hopefully there is some useful information in there to explain what is happening.