Strange problem with rendering motion blur on renderfarm

[Raven]

I am having a strange problem when rendering on Rebus render farm.
Have a scene that when I have vraycamera motion blur on it creates a strange jumping. From what i can see the farm assigns three frame per machine but the first frame on each machine is rendered differently from the other 2 almost like a different fov. So every third frame jumps.
Any ideas?

Thanks
Gavin

[Morbid Angel]

not sure how this works on rebus, and what manager they are using. In deadline there is an option to restart renderer between tasks, which means force max to remove all data from memory and reload it. This may help in your case.