[GALLERY] 'Using only These' pack filter has no results in some cases

I'm almost certain this is because it requires gallery items to have all selected packs instead of any selected packs.  Unfortunately, until/unless this gets fixed I think the best option is to manually select your desired packs, with the filter on, until it stops showing anything, which is just tedious.

I have no idea why they can't just revert back to the old, perfectly functional gallery that no one was complaining about.