Floating wall of randomly generated blocks appears

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A strange structure appeared in the desert. Or a bug generation?
This structure does not exist, it can appear in the desert, but when we leave the game, it disappears, moreover, we can break the blocks, but the items do not drop.
I put the Seed and the coordinates, but I'm not sure it's in the same place for everyone.
Graine: 932508669

Keywords for search: phantom floating block structure realm appear structure ghost fake wall peculiar weird random generation chunk error grass world