Boat clusters apply extreme velocity to the player on collision

This occurs independent of the Minecart Experiments being enabled.

Steps to reproduce:

1. Place a really large amount of boats on one block so they become a boat cluster (with command blocks, for example).
2. Jump really close to the cluster (as close as you can without colliding with it).
3. The player will get launched extremely fast.

In the video, minecart clusters carrying boats are shown, which also work.