When I was on Frozen Ocean Biom, I saw a graphical glitch, that you can see below:
[media]Strange lines within the ice blocks. These graphical glitches can occur on any mode, under a special angle of view. So, very short description, but I think it's clear to understand.
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[media][media][media]

Duplicate of MC-9553.
Also can you provide the crash report of a debug crash (F3+C for 10 seconds)?
I attached a debug crash report. I can reproduce it too.

It's MC-38022