Please try a factory reset in the config app. I’m 95% certain that the pre-cached DirectVR values that come with the latest vorpX version should still be valid, so you shouldn’t have to run the scanner normally.
If the game has been updated and you actually have to run the scanner, try a few times if it fails. Move around a bit if it fails the first time.
Note that the scanner may not work if you are using/playing mods.
If by Factory Reset you mean Restore Game Settings, yes, I restored the game settings for Portal 2 and ran the game. No head tracking and scans fail. Then I tried importing the official VorpX profile from the cloud and ran the game again. Still no head tracking, and Direct VR scans still fail no matter how much I moved around. Then I tried importing different user profiles. Some of them gave me head tracking right away, but still required a scan to correct distortion. The result of which was always field of view fail and the loss of head tracking.
Would sending you data files help figure out what’s wrong?