Plex server on Shield will not discover new media

I run plex server on one of my shields for remote access for myself only and it works just fine (content is stored on a separate server)
my problem which has just started after updating my shield to experience 6.2 is that the plex server can no longer detect new media that I have added apart from that everything works as it should, I have checked all settings on the server and nothing has changed all I have done is added a few movies to the same directory as I would normally do but the server refuses to detect them file formats are identical to what is already there so that can’t be the issue.

Have done a full power cycle reboot of the shield but still no joy anyone have any ideas for me to try?

WHAT HAVE YOU DONE TO MY PLEX. EVERYTHING IS CHANGED AND i HATE IT