Forgive if "icon" is not the proper term. I am referring to the small graphic next to each topic...typically a "?" or a check mark(answered).
When I sort in this board by modified, "Current Roadmap (Closed)" remains at the top....presumably because it is "pinned". Would be a minor improvement for that fact to be visually represented. for example, instead of the topics current "?", have it show an icon of a sheet of paper with a pin in it, or something like that. There are currently no visual clues that that topic is pinned.
update: upon closer inspection, I do see that the "Current Roadmap" topic's background(in main container "list" is more of a gray, instead of white. I would still suggest making the icon updatable to some sort of "pinned" icon though because having the topic's background slightly gray doesn't communicate well(in my opinion) that the topic is pinned. It is so common today for things in lists to have alternating white/gray backgrounds that it just isn't as intuitive as having a different icon would be.