I play on PC. Standard when zoomed out, put it in front of a rock and move, it automatically bounces back rather quickly. When switching to Legacy hitting a wall in which it zooms it all the way in will cause it to get stuck. It thinks this is the fully zoomed out distance, because generally you have to scroll in (just 1 tick) before you can start zooming out again when using the mouse wheel. I run and turn my camera using the mouse (left+right MB to run, just right if I only want to turn the camera). Those are some more specifics.