Two Trapdoor Bugs exploiting Clippable Hitboxes

First Bug: When I "clip" in the bottom part of a trapdoor by flipping it, and I try to go into crawl mode, I can't.

Second Bug: Also, When I Crawl and then clip my hitbox in the bottom trapdoor, I don't exit crawl mode.

What I expected to happen was...:
For the first one, I thought I would be able to get out of crawl mode.

For the second bug, I expected to be uncrawled.

What actually happened was...:
For the first one, I clipped my hitbox through the second flipped trapdoor (see video below/above)

For the second one, I didn't get out of crawl mode.

Steps to Reproduce:

Look at the video, It's difficult for me to explain.