Oh how interesting, the oculus platform is where it should be most stable. I'm not exactly sure what may be going on on your end and or why, but I suggest trying out the following:
- Hold the oculus button and have the headset reset it's orientation
- Reset your guardian system(you can do this in the configuration settings in the headset)
Another thing to point out is that the game is made intended for a sitting experience, so if you are standing up the head location might be off as I don't currently have a setting to adjust between sitting and standing modes. Hopefully these help solve your issue.