Elytra's and minecarts

Put the summary of the bug you're having here

What I expected to happen was...:
The player was going to sit in the minecart.

What actually happened was...:
The player glitches in the floor.

Steps to Reproduce:
1. Place a minecart.
2. Fly using a Elytra at the minecart.
3. Rightclick the cart while flying so you get inside.