Hi,
I'm experiencing a reproducible issue with Emby Server where updating the artwork of one movie causes other unrelated movies to display the same artwork.
Environment
Emby Server 4.9.5.0
Windows 10
Local artwork enabled (images saved alongside media)
Issue was already present on 4.9.3.0 a couple of days ago
This is an existing Emby installation that has been upgraded through multiple server versions over several years (not a fresh installation)