I feel that one clarification is needed: there would really be no need for a Reload button IF the Plex app for Apple TV worked properly, i.e. if it updated its library lists reliably whenever things change on the server side.
The goal to dispense with a Reload button is not a bad one in theory. If everything works fine, it’s not needed.
The problem is that things are not working fine in the Plex app for Apple TV. The problem for me started fairly recently (+/- 1 month), but has since spread to all my libraries on the Apple TV. At first I thought it might be linked to the number of items in my folders, which has been steadily increasing, but I’ve removed all kinds of stuff and it’s still happening.
On the server side (i.e. on my desktop computer), as soon as I change the contents of the folders that are monitored, the changes are immediately reflected in the Plex libraries as displayed by the Plex app for macOS.
However, those same libraries in the Plex app for Apple TV fail to be updated accordingly and still display stuff that has since been deleted, and they also fail to display stuff that’s been added. That’s when a “Reload” button would be needed and when the workaround with the Unwatched filter works.
But the button or the workaround would NOT be needed if the Plex app for Apple TV itself worked as expected.
I don’t see how this problem can be fixed by a server update, since things appear to be working fine on the server side.
It’s a problem with the Plex app for Apple TV itself. I don’t know when exactly it started. (Based on this thread, it looks like some people started having the problem months before I did.) Since my Apple TV is configured to update its tvOS apps automatically, I can’t link the bug to a specific version number for the tvOS Plex app.
But it’s clearly a bug in the tvOS Plex app for Apple TV. And it’s a really bad one, which makes it all the more frustrating that the Plex folks are staying completely silent about this and not giving us a way to report it beyond these forum discussions — especially when some of us are playing Pass customers.