Might be your head. :) Per default vorpX emulates a gamepad for head tracking in F1 2019. The emulated input is added to the right gamepad stick input. Maybe your wheel is set up in a way that interferes or you have changed the axis assignments in the game options. Hard to tell from here, but either way some conflict with the head tracking gamepad emulation sounds like the most likely explanation.
You might be able to resolve this by changing the gamepad index vorpX emulates on the ‘Input’ page of the vorpX menu or by completely disabling the ‘Head Tracking As Gamepad’ option if the former does not help.