Can someone help with the 3d monitor 4.16 update?

We have a big inconvenient at job with the 4.16 update. Our 3d monitors on our simulators have some kind of stereoscopical inception, each eyes have double vision as if each eyes has stereoscopy. It seems to be ok when we deactivate the cube map in the post process but we would like to keep it… The decal seems weird whenever the cubemap is activated or not.
Thanks for any help.