When the player mounts a static weapon that has been attached to a vehicle or object the wrong animation is used.
When the AI mounts a static weapon that has been attached to a vehicle or object using Getin Wp the animation is correct but when AI is killed there is no death animation and unit remains in position until another unit mounts the weapon.
Some static weapons have no get in option, attached or otherwise.
There were no issues in A2 and I'm sure it was fine in A3 at one point. {F25535} {F25536}