Inspect the Plex media info of the affected episodes. Look at the XML.
Find the addedAt="nnnnnnnnnnn" XML property and put the number in it into a UNIX epoch timestamp conversion tool, like e.g. https://www.epochconverter.com/
You will probably find that the date is in the future.
Which most likely means that either:
- the server machine had an invalid time/date setting when these episodes were added
- the episodes have an invalid date/time stamp on their files, and were added during the course of the Plex library creation (which is the only case where Plex will use the file’s date stamp)
Check for the above. In case 2, correct the file date.
Then perform the Plex Dance with the affected shows. (The complete one, in exactly the noted order.)
