Even on doors that appear to be level with the ground, it seems like many carts will collide with the door instead of passing through. This is a very frequent occurrence and I am surprised more people aren't complaining. Its a big deal when the entire game can often be decided on whether or not it works. here is an example 22:46 match id: 44243206 . it feels like this happens about 10-20% of the time. in one game it actually happened to me 6 times in a row from the beginning, perhaps that has some sort of significance