Does this fix the loading of movie/series pages on Plex Experience ? or what is this referring to? Some titles take forever to load in the new PE. Some titles won’t even load at all.
(Performance) Loading media details screens can be slow when item is part of many collections (PM-2390)
Yes, this fix is specifically targeted at helping with these slow page loads in the new app.
It shouldn’t affect that many people as it takes some very specific circumstances (i.e. large number of collections and/or large number of libraries with collections). Most people affected seem to be using Kometa to create hundreds of collections, often these are also very small and only contain one item which was exacerbating the problem.
If you have a lot of library sections it can still take a bit to check through every one. If you don’t really need many sections it might be a good idea to consolidate these if possible.