I'll apologize ahead of time for not having screenshots, but it is easily testable.

Whenever you equip Bounty Hunter's Master Assassin Tails and ALSO have the shoulder armor from the same set (The round black pauldrons) the tails' physics glitch out.
They seem to like, bend in mid air and twist around. I've tested this using other armor and other shoulder armor from different sets and the problem does not reoccur.