For a while now, after gaining a raid set piece through the raid itself or by using the Creation Catalyst, it doesn't show the set pieces gained on the set themselves while the set icon shows the blue border box on the set itself indicating you have gotten new appearances to the set, This also affects other sets than just the current raid such as even covenant sets or even the dungeon sets. It takes it a while to register on the set unless I try to relog or change to another toon then back. Also, even disabling then reenabling the addon solves the problem.

Came here because of what I believe to be the same issue. When you unlock an appearance of a set, the set does not automatically update to reflect that. You have to either reload or relog to see the newly acquired appearance on the set.

Before reload: https://i.imgur.com/BVcd66g.png
After reload: https://i.imgur.com/STemW2w.png