I feel like this is a stupid question, but it's been a while since I've filtered a board and I think some changes were made. I'm not seeing the filter option, so i used search, and it seems to work for filtering by who is assigned things, but not so well with labels.
For instance on this board I am trying to just show cards with a certain label on a specific board. And i see the prompt that says to use the "#" so i do that..

And then i type the name of the filter ("security" in my case), and it returns any card that says security in the preview, but doesn't actually change anything on my board. What am i missing here?