if you have two platforms with one gap between and the first platform has a belt that is already connected (2 tiles long)
if you attempt to place a space belt to "go under" the first platform, the visual render shows the first belt will change from straight to first platform to change to the sdecond platform
however, when you place it the first belt remains unchanged whilst the "exit belt" is placed, making it incomplete
images show before, place ghost and after, i would expect if you are placing the belt over an existing, the existing is changed rather than being untouched