Detecting artwork over SMB share

I have recently moved to a central server and sharing via SMB rather than moving USB drives around the place. With all of my media I scrape it using MediaCompanion to generate .NFO files and to selectively download the fanart, extrafanart and posters that I want. Once I have done this and boot up KODI on the other computer, in the update library on boot up instead of using the existing files it rescrapes them more often than not pulling artwork I don’t want. Before when I was transferring files on a USB drive it just used the local artwork, but now it’s obtaining it over a network it is behaving differently. Is there a setting somewhere that I have missed? I can’t seem to find it in the Settings or the Files settings either.

Windows 10
Jarvis RC3

EDIT:
KODI log

I’ve checked and it is not replacing the original artwork on the server, just using the new scraped artwork on the media centre.