Collections tab just displays films on 1 Library

Plex Players
1

Server Version#: 1.41.9.9961
Player Version#: 1.109.0.329
On my Plex for Windows app in one specific (film) library the Collections tab just shows films i.e. the same as Library tab. On all my other film libraries the Collections tab behaves normally. This is the same behaviour on both my PC’s running Plex for Windows.
Lastly on all my other players (HTPC, Web, Android) it acts correctly.

3

Settings - ‘Show Advanced’ - Plex for Windows - Debug - “Restore Defaults”