Unity doesn't render an animated object

Unity Engine
1

I have an arms object that I animated. In some position unity doesn’t render the arms. Maybe unity think that the object is outside of Field of view:
As you can see If I look up, it doesn’t render. If I look down it doesn’t render. It is working only when the fore arm is in the field of view:
jqt8pt

I should increase the Skinned Mesh Renderer bounds?

2

Sorry for this post I figured out. The initial arms was in some kind of "/" like an upside-down V and the Skinned mesh renderer bounds was a box that fits only the initial position. I increased the bounds and now it render the entire animation.