I also receive this problem. It is the exact same bone problem that we had a long time ago. Basically, if you have two of the same models, and you can see both of them on the screen at the same time, then their bone animations will not show properly. However, all the vec_for_vertex ect commands are proper.

So if you have two turret weapons on the screen, and you are moving the bone of one, it will show the animation fine until you can see that other turret weapon which shares the same model. Once you see the other turret weapon, the one you are controlling will stop moving, or it will copy another model of the same types animation currently on screen.

I believe the fix for this before was setting a model like so:

my.u = 0.001; my.v = 0.001;

However, I tried this, and it no longer works. Please fix this as soon as possible.