If I'm looking at my "Focused" Inbox (a feature I like, thanks!) and then select a filter, say "Unread", all of a sudden my "Other" Inbox messages are displayed. Oops. I consider this a bug, when I filter, I want to see less, not more. It would be acceptable if "Focused Messages" was one of the filter options and I defaulted to match what view I started the search from. In this case, it would probably be best to expose a new name for this filter and allow the values: focused/other/all.