Lol the bug broke the tank as in it would continue shooting in place until it died. Or a least i heard people complaining it did that, and AI was stuck in that limbo whenever it used it, which is why i never used the ability.
Nope, it just kept shooting till you set another order. You could just quickly kill any OKW building. I think it was a matter of setting the ability range into a small spot so the turret made little to no turns.