Hrm… I’ve been messing with this - applying priority filter in lots of situations in my outline - to see if I can find the bug you’re reporting… and I’m not encountering any problems. So far in all my tests it seems to be working as expected.
Anything you can do to try and narrow down when this happens would be a big help. A screenshot with a pane “filtered wrong” alongside a pane with the full text to see what got wrongly filtered out?
I’m also wondering - is it possible this “bug” is a confusion with the way outline view works with a filter like this?
If the item with priority is a couple levels deep in the hierarchy, then applying the priority filter is going to hide it’s “sibling” items…
I like the way priority filter currently works in outline mode - but also can see how it may not be the way everyone expects it to work!