Inspect the date of when this was supposedly added to the server.
Grab the contents of the Plex XML info of the latest episode
and copy the numbers of the
addedAt="..." and updatedAt="..."
properties.
With DVR recordings, also get the mediaGrabBeginsAt="..." number.
Now convert these numbers to a readable date and time using something like https://www.epochconverter.com/
Do also inspect the ‘Modified’ date/time stamp of the media file itself.
You will probably find that one of these dates is in the future.
The Plex Dance will clear the wrong date of the affected items.
To prevent this from happening again, you might want to make sure that both your NAS and your plex server always have correct date and time. By enabling the automatic time sync. (on Linux, this is usually called ntp).
