Sometimes you can found (on oasis in the desserts) some floating sand and if you broke one of blocks that this floating sand touches, the sand will fall down.
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It has been that way a very long time. I don't consider it a problem
Yeah, but maybe finaly it will be fixed _
Honestly I think this should be left as-is. It brings another level of caution and danger to the game. Yesterday I was exploring in a desert, when my friend popped a block. An entire hillside came down right next to me. Luckily I wasn't directly underneath, but it definitely got my heart beating.
Not really a bug, and like Talven said I'm rather fond of this specific "bug".
I've seen this happen too, and I wish it were fixed. Alternately, if there were some way for the player to produce the same structure, that would be neat. I don't like that the generated world contains things the player couldn't create.

This is a "feature" of world generation.
Would be damn hard to fix and probably slow the world generation down to 10 min per chunk 🙂
I don't think this bug should be fixed, as it looks kinda cool.

This issue, MC-5485 and MC-1340 are likely duplicates of MC-610; there is a lake underneath in each issue. The remaining two issues seem to have different cause. Since dinnerbone has stated in this issue that it is a "feature", might be reasonable to resolve MC-610 the same (and hint about the reason being in this issue).
Then again, the MC-610's detail (grass/flowers/etc) can have easy workaround (just check one more block above and remove as necessary), so maybe keep it open until decided by Mojang.
i can confirm this bug!

And Mojang has confirmed that while it is a bug, they have decided it will stay, thus this (and some other related ones) are resolved as "works as intended" or the more correct "won't fix". See MC-610, Dinnerbone's comment.

This has to have state "Won't fix", not "Works as intended".
That's right. WAI does not make any sense.
It's certainly a feature and not a bug. Floating sand has been in the game since forever, and there even are special particles just for floating gravity blocks.

Careful with the terms.. In this particular case, it belongs to the category of being a bug that is (was) accepted (by Mojang) as (more or less) permanent feature. (An issue can be both, a bug, and a feature, i.e "Won't Fix".) Note also the use of quotes around the word "feature" in earlier comment by Nathan Adams. (It was certainly nice that those particles have been added there, giving a warning about its volatile nature.)
(The part of "been in the game since forever" is one of the common, yet very bad reasons for stating something is not a bug. Been in the game for long might indicate, or at least correlate, on it being a feature (or at least accepted as "wont fix"/"feature"), but... For example, see MC-7200. It is a very obvious bug (incorrect math), been there for around 9 years.)
Btw. my earlier comment about noting to see Dinnerbone's comment (in MC-610).. no idea, I couldn't myself find such any more. However, Nathan Adams once upon a time (2013) resolved it by using state "Won't fix", which implies it being a bug, but just accepted to stay as a "feature"...
... Until years later, Mojang decided to reopen it (meaning they have intent to work at least on some part of it), with priority "important". Does not sound to me like it being a fully accepted "feature" at that point. The problem is, as usual with Mojang, they don't bother much with looking at linked issues, and end up resolving them in different ways. (Or not resolving at all, compare MC-7196 and MC-7200 case, frigging same classes, even same methods, fixes provided, issues linked, and they fix just the other one ><). MC-610 was marked "Won't fix", this one "Working as intended", even though it was clear that both should have been handled the same. And later, MC-610 was reopened, this one was not.
Note, the generic root cause for most of these floating stuff -related issues are sort of same, even if the technical mechanism might have slightly different ways in leaving the floating something in the world. Thus, I'd assume that if Mojang considers one floating weird to be worthy of fixing, they might consider all of them... if they just remembered to look at the linked issues.
The particles emitted by sand are proof enough for me that this is fully intended by now.
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