Hi,
I noticed recently that if you have a category which does not use the Solved feature, but then edit the topic to be placed into a category that does, the toolbars (expanded from the ellipsis next to the Reply button) do not refresh to display the Solved icon. A page refresh is required to update them.
Not sure that this is necessarily a bug, but it may be nice if these were updated upon that change, or, detect whether the new category uses the Solved feature, and then force a page reload, although that wouldn’t be quite as sleek.