Confirmed in 1.21.3
As stated in the comments section here and in the comments section of the duplicate, there are worlds that are reproduced and worlds that are not reproduced. This bug is very troublesome. (Using a translator)
Hello. I am the one who reported the bug.
MOJANG-san, could you please reconsider the priority of fixing this?
This bug is very troublesome for people who make flying machines. Spawning cannot be stopped by lighting such as sea lanterns and glowstone, or glass blocks. The only blocks that can stop spawning are limited blocks such as bottom slabs. This applies to all circuits that move blocks with pistons.(I am Japanese. Use Google Translate.)
This is a bug that many people encounter.
Can confirm in 1.20.2 and 23w42a.
This bug is "very important". I fell to my death many times due to this. Mojang should rethink its priorities(using google translate)
Can confirm in 1.20.2
Both transparent blocks and solid blocks will be black.
Hopper, dropper, and dispenser have been fixed in 1.20.2 Pre 1, but sugarcane and cactus have not been fixed. You can confirm this in 1.20.2 Pre 1. The age value is not updated! It will be 0 when you right-click. I am holding a potion in my hand to make it easier to see the right-click. I'm using Google Translate...
[media]
I created a report using the translation.
If the sentence is unnatural, please correct it.
Does that mean it's unfixable?
This bug is annoying. (using google translate)
Sorry for the duplication.
It was indeed mentioned in the 24w09a article.
"In-game screens such as containers and books are not affected by these changes"
https://www.minecraft.net/ja-jp/article/minecraft-snapshot-24w09a
I just think it's unnatural...