That's a negative. Unless Lampshade added that in somehow, then that was leprosy, not you being mirrored. Waiting for over 24 hours in the arena outside of the walls showed nothing but 3 drops of agility.
Weird. Either it's something in IVANtty, or then my mirror had leprosy which the real character did not have after the match.
In the latter case, I must've had unnoticed leprosy when entering the arena which was cured by losing the match, or then the mirror image managed to contract it inside the arena. I'll have to try and repeat it.