It could probably use a help entry in-game, but for me, I've yet to encounter a problem since properly saving my gearset in the first place. In the 6.2 notes, I've pointed out the warnings they offer about previously saves portraits.
Hitting that "update gearset" button is also important. (I think this is what a lot of people are missing when they change things out.) I've just done that out of habit since I started playing. I don't mess with visor, but I'll try it out and see what happens. Short of changing race, I've been going through most of the update scenarios and have yet to encounter a portrait that resets.
