Ridden boats not teleporting by @e

Teleporting boats with @e is messed up.

I was testing with the @e. I teleported different entities while I was riding them, with all but boats, I went with them.

It teleported fine until I got in it. Then it just kind of sunk. I got out it still sunk. After disconnecting from the world it worked.

To reproduce it:
1. Set a command block to teleport an entity.
2. Get in a boat
3. Pull a lever that activates it
4. It doesn't teleport like other entities.