hello, I encounter the same kind of concerns.
My X axis is never centered in the profile by default. For it to be, I have to activate the yoke so that the axis goes to the center.
When I fly and engage the autopilot, I have to move the yoke axis a little bit regularly to get it centered.
If I don’t do this, the plane turns left.
I don’t know if this is the same problem you are having.
For my part, I have not found a solution to date.
