Asymmetrical Shoulder Pieces Appear During Skulls Arc

[AustinSmith]

During the mission in the skulls arc where you go undercover to infiltrate the Skulls and you are given a generic skull costume, the left asymmetrical shoulder piece will appear on your character while disguised 

[xColdxFusionx]

While I'm not 100% certain if it occurs on this specific mission, Tail parts will also ignore disguises in many missions that apply them, with varying results. (I know for a fact that the Hellion disguise in the Galaxy City intro questline and the Longbow disguise in one of the early villain missions are affected by this; I was likely far more amused than I should be that this demon costume had a bright gold and green tail that would have given me away instantly.)