I was playing a game with my friend and decided to use the ostruppen. When I got them vet 5 and upgraded to have the iron cross and they again reach vet 5 they were unkillable like literally invincible. They take no dmg except for crushing troops they were better then wolf brigade or bobstruppen. The tank couldn’t kill them unless it was an accidental crush. No amount of infantry could also kill them. Arty? no chance again even a b4 wouldnt kill them. And I had no buff on them so feature or bug?