Bug The End City

Put the summary of the bug you're having here

What I expected to happen was...:
That glitching trough this "parkour tower" in the end city wil be fixed

What actually happened was....:
I was in the new End city . I was attacked bij a shulker and i was flying and i was hanging by a block above me and i press the shift key and i bugging through the ceiling.

Steps to Reproduce:
1. go into the End city.
2. walk in to the "parkour tower" .
3. Get hit by a shulker.
4. Fly against the block above you and spam the shift key.