Have the same bug here.
I play the game a few weeks ago, so yesterday the game downloaded a huge update and I tried the MiG 21 (instant action -cold start). During the takeoff the roll axis was very sensitive. The plane tried to roll in the left direction without moving the stick, and after correction I figured out the stick is very sensitive. I haven't changed the axis controls so I used the default settings.
Before the latest patch the plane was very stable, I could fly without holding the joystick, now it is almost impossible.