What crossing asset is this? There is an invisible road spline where the track is supposed to be. You may want to find another asset to use instead of that one.
While the ATLS and the TRC crossings are a bit more of a chore to set up, they're quite versatile due to not being a fixed angle but for some situations it's easier to use the old-fashioned prebuilt crossings. There are some nice tutorials on how to set these up with ATLS having the information built right into the assets.
How I set up level crossings:
I get the angle of the crossing by placing it over the tracks where I want to "cut in" the crossing.
I then insert spline points in the tracks on either side of the crossing and do the same with the road if the road crosses over the tracks already.
After moving the crossing to the side, I delete the track and road bits in between the spline points leaving a space for the crossing to fit in.
I then move the crossing into place and connect up the tracks first then the road splines on either side.
The process is a lot quicker than it is to type this out.