Hey ,
We were in the middle of shipping, and have gone into support mode currently. 
Answering your question: There are some items which are non-uniformly scaled in the scene, however the flicker/artifacts are also present on objects which are uniformly scaled as well.
Does this mean we can’t have ANY object in the scene which is non-uniformly scaled, or that flickering/artifacts should ONLY appear on the non-uniformly scaled objects?
Cheers.