Bamboo bug, achievement bug and generation bug

Here I found several at once, some I don't think are bugs but it seems I never saw them in the last update.

1. Bamboo bug: Either a bug or an error, so the top of the bamboo has a different size than the bottom of the bamboo.
2. Achievement bug: Maybe this is just a mistake, so the image on the unlocked achievement becomes flat.
3. Generation bug: So the generation that I met, I never saw at all during the last 1.18 update. Really it looks like old minecraft has bad generations.

That's the bug I encountered, hopefully fixed. Again I think some are not bugs but errors. That is all and thank you.