While climbing on any block that is climbable, if broken at while a block is above the player, the player is able to float while holding the jump key.

What I expected to happen was...:
To fall once the block that was allowing me to climb was removed.

What actually happened was...:
I was able to stay mid-air until I left where the block once, stopped holding the jump key, or removed the block above.

Steps to Reproduce:
1. Build up a climbable surface to suspend yourself at least one block off the ground.
2. Have a block above your head.
3. Break the climbable surface