Helicopter rotor not moving

On Liberation Peak: Ridge 13, I noticed that the rotors on every helicopter are not turning. Only when they are shot down and crash do they start turning.
They fly normally, but the rotors are frozen in place.

Already posted it in the German forum: https://forums.ea.com/discussions/battlefield-6-general-discussion-de/rotor-von-helikopter-bewegt-sich-nicht/12450618