Summary:

In the new beta update, it is possible to make your character start flying while crawling

Steps to reproduce:

1. Launch minecraft Bedrock Edition with "experimental sneak" enabled

2. Preferably go underground, make a 1x1 tunnel and stay in a hole where you can stand up 

3. Place a trapdoor above you and lower it into a crawl state.

4. Quickly jump repeatedly while trying to go to the 1x1 tunnel and enter it.

Observed Results:

The player begins to fly in a crawl state. Depending on the platform, it can be difficult to exit the mode, needing to change the game mode to disable the option. 

Expected Results:

The player should be able to fly in this state with ease, but as far as we can see, it is difficult to enter and exit the state on the cell phone, requiring multiple attempts.

Notes: It took me many tries to get out of that state. I only got it when I closed and reopened the game