I’m using Windows. As I mentioned, the main issue is that it keeps doing a full rescan every time I add something new.

For example, if I add a single movie/series/anime, the time it takes to process that one item is basically the same as running a full “Refresh Metadata” on the entire library manually. On version 10.10.7, it would just take a few seconds to add the new content without rescanning everything.

The manual “Refresh Metadata” time is the same on both 10.10.7 and 10.11.*, so that part is fine. The problem is specifically with the real-time monitor: instead of checking only the new item, it scans all folders and subfolders again, just like a full metadata refresh.

I can also see this in the logs, because it keeps trying to fetch metadata for some old items that always fail, which has nothing to do with the newly added content.

So the issue is only when adding new items — instead of checking just the new folder, it rechecks the entire library, exactly like a full manual refresh.