I recorded another video showing the problem on external view. The stick's deflection remains the same (joystick), say around 30 degrees, and quite slowly. It's clear that the Vulcan reacts somewhat slowly and slowly to the left, which is a good thing. However, if the deflection is the same, or even smaller (sometimes just a slight movement of the joystick to the right is enough), the Vulcan immediately starts moving strongly to the right (too sensitive to the right). The roll rate for both directions isn't the same.
https://youtu.be/suhUSuICFGw