Did some settings revert to default that I don't know of after installing the upgrade this weekend? when racing in 2D I have no issues at all, but when I hop into VR I get sick of head shake (mostly up/down- that I never noticed in the past 2 years I raced AMS2 in VR.
Settings/Camera/Movement Try Legacy Mode ON and 70%-100% depending on your preference. This will keep your head steadier. Here's my settings.