I noticed with the latest update to Plex Server for Mac there is a Discover drop down on the Homepage. When I change from All Libraries to Movies or TV Shows, it does not save. When I close a browser and open the Plex Server Homepage again, the Discover drop down is set back to All Libraries. This settings should be saved to what the Admin sets it to. I have gone through the settings tabs and did not see anything to choose what the default Discover setting should be.
This setting is also needed for the Apple TV 4 Plex client.