Somehow, Bambu studio has some bug in it and needs sorting. When models are rotated, sometimes they are turned to another position as soon as the mouse is released and it is really frustrating. The software was’nt this way some time back.
Yep, I was just dealing with this last night. It seems like it happens once you try to make more than one rotation change. So, I reset the rotation and then set what I needed and it worked on the first try.