Summary:

With the release of the new update 1.20, I created a new world and enabled the "short sneak experimental" and went to test it. It is still possible to crouch below 1.5 blocks, but it is no longer possible to crawl, being that it was possible to crawl during the betas

Steps to Reproduce:

1. Launch Minecraft

2. Create a world with "short sneak experimental" enabled

3. In the world, put a trapdoor in your legs and lift it up 

Observed Results:

Player can no longer crawl

Expected Results:

During the betas, features were added to make the player able to crawl, similar to the Java edition, something that should have been available in the experiment. 

Screenshots/Videos Attached: Yes

Notes: It is still possible to crawl like it used to, using a bucket of water to make the player duck and start crawling at the same speed as they run.