Ender pearl thrown down while crouching teleports the player upward a bit

The bug

Ender pearl down teleports up.

How to reproduce

1. Stand in front of a two high wall or tower
2. Start sneaking
3. Throw an ender pearl at the lowest block of the wall while walking forward
   → It teleports you on top of the wall, although you were aiming downwards. Even if you hit yourself, it couldn't teleport you higher than the eye height.