I'm sorry, my English is not good, so I used DeepL translator, thanks for understanding
This is a bug I found in minecraft 1.17, it has been there since 21w10a, the game's materials become misshapen and very weird, I uploaded a screenshot of the game in the attachment.
I only found this bug on my computer, my friends playing minecraft 1.17 did not have this bug, I spent 165$ to buy this game not to play the old version, so I hope mojang team can fix this bug