Hit Box issue?

Regarding behaviours, make sure the tank is set to follow him/herself, not defend, and AI must be turned on. If the tank follows you, I don't think they will attack all the time, especially if you are not attacking.

In my games I set all companions to follow the tank, and the tank to follow themself, and they fight just fine. I also directly control my character, and turn off AI on my character.

I think assigning a task in tactical mode overrides default behaviors, that is why the AI will attack when you do that.

I don't think it's a behavior problem. Like I wrote in my first post I checked them and they're like yours.

But I recognized if I give the attack command directly, press Z and switch to tactical i can see that everybody of the group has the the command "attack". If give it the attack command over tactital everbody has the command "standard attack". And I think that's the point. With the command "attack" Meeles don't attack with the command "standard attack" they do.

Ah, I see. I never give commands to my companions, I just let them fight however the AI decides. I don't select targets unless its a large battle and then I do so through the tactical mode.

Given how awkwardly the hold command functions, and that the companions constantly try to re-engage enemies after you tell them to ignore combat, I'm not surprised the attack command is also broken. You should probably just ignore your companions and let them fight unless you are issues orders using the tactical camera.