Using a Riptide Trident to whirl below slabs causes player to glitch to the top of them

As said in MC-125774 comments :

 "You no longer keep the swimming / crawling animation, and instead stand up, however your eyes are still where your feet are."

Hey Hugman! it not need a swimming, This weather is rain or thunder now you can use Trident

Can confirm in 20w49a.

Can confirm in 20w51a.

Can confirm in 21w06a.

Requesting ownership of this issue considering the original issue poster's inactivity since 2018.

After further testing, this issue can likely be closed as invalid, or Working as Intended. The player does not necessarily glitch on top of the slabs, but instead the 'issue' (or rather, behavior) is that the trident positions the player currently in the riptide animation at the upper half of the 2 block tall player hitbox, ultimately moving the player on top of the slabs. Originally when testing this, hitboxes were not enabled, so the behavior was not as apparent.

Here is a video demonstrating how this is likely intentional:

@unknown  It still shouldn't act like that in third person, if you try to glitch through the blocks in first person, nothing seems to happen, you pass above the blocks. So why does third person differ? 

Anyways this also seems to affect 1.20.5 pre-release 1.

Update: Cannot reproduce this in 1.20.5 pre-release 2, so I think it's fixed.

It doesn't differ in third-person. The camera is positioned above the blocks, just as in first-person. The player's model (not hitbox) appearing underneath the slab is due to the same general behavior as MC-125848, just with the trident instead of swimming.