I am still getting the notification bug for customization. Specifically it says I have something I have not seen in Special Weapons for Fire Team. I have gone to all fire weapons under Special Weapons, both main hand and off hand. I have clicked on every skin tab and every attachment tab for all 3(?) weapons. The yellow notification still remains.
EDIT: After further investigation it seems to be connected to when a new weapon is unlocked or a new attachment is unlocked. I just got an attachment (holographic sight) for the first shot gun you get and equipped it with the holo sight but it still says I have the notification for the weapon. Yes I doubled checked all skins and other attachments, still bugged.