TV Show artwork refusing to show

@JuiceWSA said:
The Plex Dance®:

  1. remove show/movie from library
  2. update library
  3. empty trash
  4. clean bundles
    https://support.plex.tv/hc/en-us/articles/200392106-Library-Actions <— update library, empty trash, clean bundles
  5. bring names and structures into compliance/ or the ultimate bundle reboot operation
  6. replace corrected show/movie into library
  7. update library

All Steps. In Order. No Shortcuts.

This worked for me. Thank you for the solution. I also believe the whole certificate palaver with the TVDB web certificate on Windows Server has played a part in fixing the solution, it probably just needed this refresh to get it working.