When you hug a wall and fall down it while pressing any movement key, you float down and don't take fall damage. A video demonstrating the glitch is attached.
MC-143116
Floating down walls
Resolved
Duplicate
0
whosthisjoke
(Unassigned)
Unconfirmed
Minecraft 19w04b
Retrieved
Same problem, but your video is like Spider-Man footage 😃 😃