"Grunge Buster" Costume Bug (wrong class)?

[シベ 部長]

Anyone had this bug?

I unlocked the Grunge Buster costume via Lost Pack (already had it on Engineer the other day) but it was then for Driller yesterday. When I checked the wardrobe menu, there was an icon on the bottom for any class other than driller (red icon) that I have a new accessory for Driller but when switching to his accessory menu no red icon shows up and is not available under costumes. When I left the game and restarted, the notification is gone.

I then found out from the wiki that the costume is exclusive to engineer only. Today I unlocked the same costume again through lost drop but this time its for Scout. Same thing happened, the notification is there under class that isn't Scout but no new entry under his costumes.