Model get hidden when camera moves?

Have some what strange issue, as when I move the camera one of the models gets hidden from the camera to be drawn. Thought it had to do with the clipping settings on the camera at first, but that is not the case. As that deals with depth of how things get clipped. And that works as it should. How ever even if i change the clip values so the arms get sliced and I only get the see the left hand at front, moving the camera will still hide the hand like it dose in the example bellow.

Anyone who has any idea what might be the reason of behaviour like this?
8921702--1222217--Hands clips away..gif

at least it can happen if mesh bounds are wrong,
but not sure why that would happen for an imported mesh
(more likely to happen if its procedural mesh and you havent set bounds correctly)

or if the mesh gets modified by shader (moves vertices), can cause bound issue too…