Put the summary of the bug you're having here
What I expected to happen was...:
That I would get in the Minecart Fully; and be able to right click out of the Minecart .
What actually happened was...:
What Happened was that the Horse Gui; "Press L Shift to Dismount" Message came on, and I was halfway Down in the minecart, my vision 3/4 filled by minecart.
Steps to Reproduce:
1. Get in Minecart
Relate to MC-21695