I had this happen for one weapon, but not for another.
My hope is that the current orange dot problem is tied to the new attachments going bye bye problem.
I only had a single week where I did not have an orange dot problem. Even directly after the "solution" patch, I still had orange dots and the mark all as seen... well, that's never worked actually.
Actually, I will say this. I've noticed that the last gun I've unlocked something on will always have an orange dot. I can move this orange dot by unlocking something on a different weapon, at which point the orange dot on the old weapon will clear up magically, but now the dot is just on the new weapon. To my memory, this tends to stay only on primary weapons, though I don't really unlock stuff on pistols often and it doesn't remain the last thing I've unlocked something on for long.