visual glitch, If you look in the right way you can see threw blocks like you where in spectator mode. not sure what you need so i gave you an f3 screen-shot.
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I'm unable to reproduce this issue in 1.17.1.

I think I might know why, the camera head movement up and down should be limited to a certain degree so that this is prevented in the near future, I was able to produce this bug in 1.17.1 by the way so I know exactly what you are talking about. I will see if I can add a fix to that!
This duplicates MC-8684 based off of your resolution shown in the attached images (2048x1056) which is widescreen.