Doesn’t this interfere with the one DoT at a time rule? Teslas constantly apply DoTs to the enemy and if the first one doesn’t freeze anything, it’s not going to freeze unless the grenade expires. Unless of course, you were being sarcastic.
I’ve heard some people say that they do receive the penalty and it certainly feels like it for me. I can empty an entire mag of a cryo gun into some frozen dude’s face, but it takes about half as much ammo when I switch to a non-cryo weapon. Maybe i’m just imagining things, I don’t know.