As of yesterday most of my metadata fetching stopped working. I checked Infuse on macOS and multiple Apple TVs. Infuse on macOS and ATV is v8.1.2. I have metadata fetching turned ON and prefer embedded artwork OFF.
I submitted diagnostics and it gave me code CTDGX.
Some random movies/shows still work fine, but the majority of them don’t work.
Can you try using the Edit Metadata option on one of the affected items to reselect the correct movie/show name? Doing this should refetch the metadata and artwork for that item.
You may also check to ensure the folder(s) havent been tagged to use local metadata.