I have the 5k+ and 8k. When testing Unity worlds in VRchat (free vrgame) I notice that a lot of random object here and there in various worlds will have incorrect stereo and the left and right eye on those items is mismatched.
For example looking at a pumpkin in a world right now. It looks fine on the rift and vive. But the 3D looks inverted on the pumpkin on the 5k+ and 8k. or a world called peccant canyon some of the trees look wrong and 3d is backwards. I tried parallel projection on and off to test and rebooting and nothing helps.
It seems something with the software rendering is causing this in VRchat, wanted to let you know.