I’m having the same issue. Samsung Odyssey in 4.18 seems to render out each eye differently. Changing the post process volume to 90% fixes the double vision but creates some nauseating scaling effects when you tilt your head. I don’t seem to have the problem in 4.19 but unfortunately I have purchased a couple projects which haven’t been updated to 4.19 and are completely unusable for me.
On another note: I am experiencing exactly the same “double vision” problem in TwinMotion (which I assume is currently based on 4.18). Unfortunately, they are not responding to any of my requests for assistance.
I know that I seem to be in the minority (WMR headset) but hopefully someone can create a fix!