So yeah, on a shield/energy melee brute female if any of the shield defense toggles (deflection, battle agility, etc.) are active then Tough's animation costume setting (as set in the tailor) is forced to the default chest pound and scream. Detoggling all shield powers restores the setting to what the costume has set in the tailor.
Needless to say this is super annoying, as changing the animation is due to not liking the default for me. Attached is a costume file from the character I noticed this issue on as she's my only shield alt.
bia bug.costume