Server Version#: 1.29.2.6334
Player Version#: Plex Web Version 4.93.2
While trying to reproduce something reported by a forum user, I created a new Movie library. The library was automatically pinned, as per normal behavior. When I was done, I deleted the library. But it still appears on the sidebar, with an error flag:
This is purely cosmetic, since unpinning it makes it go away, but it was a surprising thing to see, and a change from past behavior. Deleting a movie should naturally include unpinning.
After making sure that there are no forgotten browser tabs on rarely used devices in sleep mode, try re-enabling this sync.
See if the ghosts are returning.