technical issue with camera

[Edit] This bug comes from vray himself apparently, forget it.

Hi everyone!

I have a serious issue with the camera during rendering time.
In my scene, the cam is static. When i launch the rendering, sometimes the camera randomly does some "jump", as if she rotates on his Z axis. (around 1° approximately)
I tried to render my scene in scanline and it doesn't happen.
I have absolutely no idea from where it comes from, maybe not from solidwork after all, but just in case i prefer to ask

I began to work on these scene on a different computer, in a company, and now i work at home on my own computer, and i had these issue on both machines.

Is anyone have an idea?
Thanks,