Sprint-jumping in a 3 block tall space makes the player sneak for a short moment, stopping the sprinting.

Steps to Reproduce:

1. Have a 3 block tall space
2. Start sprint jumping in any direction. 

Observed Results:
 - You stop sprint jumping, you sneak and block with your shield (if equipped). 

Expected Results:
 - You keep spring jumping.

IMPORTANT notes:
 - This bug only occurs with the 1.5 block sneaking being activated.