Unexpected rolls

I’m newbie to MS FS.
For this reason I’m following all training included in MS FS.
However, when I try landing’s training series I’ve noted that even if I do absolutely nothing with keyboard or mouse the Cessna 152 slowly rolls (5-10 °) then goes in orizontal flight , then rolls again.
The same happens if I configure and use my TurtleBeach Velocity One Flight controller.
Any idea?
Thanks in advance

It’s most likely wind that is causing this. You will need to constantly make small inputs to maintain your course.