Sometimes when I start playing a TV episode (may happen on movies, I don’t watch enough to notice) it identifies the episode as being 2 hours long exactly. This happens on the web player which is the latest version and I have noticed it over the last couple of updates.
If I stop playback part way through and resume the length is then correct.
This has happened recently with titles from several different sources and of a wide variety of ages and at least two different file types, so it doesn’t seem to be an issue with the files.