It´s not the bug he´s encountering, he did something mindless and asked a stupid question.
He attached a female armour on a male trooper. Means the body mesh of said trooper switches over to female, as it displays the female armour.
You can do the same with the PC display dummy and adore his newly attained beardy beauty.
I mean it should be pretty clear which armours are females only (the tits should be a definite hint) whereas it´s really tricky to spot for some helmets (like the Adventuress Heume, which is too small for male heads so male noses and ears stick out of it) so the blame is entirely on him.
So the solution is either to swap over his background culture if he likes the Xena Armour that much and can´t live without it or equipping those bearded mean pieces of manly soldiery with something else or - finally, as last resort - develop a blitzkriegstyle love for Choncita Wurst and accomodate yourself with crossdressing.