The Anti-Air vehicle IFV-6a's missiles are coming out from the right-side launcher only. When firing one, the left-side launcher is getting empty instead.
As you noticed, this vehicle have 2 launchers, each of them contain 2 launchers tubes. Then, you have a maximum amount of 4 missiles.
Theoretically when you've fired a missile from the left-side, the tube from this side should be empty and not the reverse.
So, whenever you fire, the missiles will always be fired from the right side. Therefore this animation is not correct.
I highly hope that missiles can be fired from the left side, too.
If this is not being treated yet, take your time, please. Since there are more importants to worry about.