close eyes on repositioning
The visual clues and the inner ear clues are conflicting, so remove one, then all will be fine.
As ZFT suggests.
Another problem is to do with reading glass, expecially progressive lens. These glasses have a horizontal interface between diopters, and the position that you are sitting in does not always have a horizontal interface, combined with your up down and rotational head movement the brain is received movement from your inner ear, and the eye is seeing different inputs.
In the sim, I do not wear my AME prescribed progressing, but wall mart 5$ bi focals.... The I have no problems at all, but progressives are hell.
Glf