Sprinting while mid-air works with sprint button but not with W double tap

I was building something, jumped from noob tower and I found out you can start sprinting while falling. Strangely it works with sprint key but not with W double tap. It might be connected with FOV bug observed in flying in creative or raiding horse.

What I expected to happen was...:
When I was free falling and double tapped W (forward key) I expected to start sprinting

What actually happened was...:
I didn't sprint

Steps to Reproduce:
1. Jump from great height
2. Quickly press W twice
3. No sprinting
4. Press sprint key
5. Instant sprinting