Ideas
The orange dot that appears to indicate that weapon has a new attachment sometimes does not clear when all new attachments have been viewed. It appears to be that every time a "new" attachment is cleared, a check is done to see if the weapon wide dot should go away. This check appears to also check if there are any camos, charms, or stickers that have not been seen. Viewing the "new" camo, charmm, or sticker clears the marker for that item, but does not update the overall notification for the weapon.
Figured this out after having to clear the "new" notifications for the new universal attachments introduced with the nightfall update. Also would be nice to have a "clear all new" button that gets rid of all of the dots, and make the "new" notification for universal attachments clear for all weapons once it has been viewed on one.
Same for me, It is when you unlock a new weapon package/unlocking a new weapon since the new patch. E.g I unlocked a weapon package for the M60 which I've had at level 50 for over a month now. No orange dot on the new weapon package so I can't remove the dot from the weapon it self.
Very annoying.