I know there is a bug report related to items turning black between certain Y coordinates, but now this does not happen at very high coordinates, but also from y94 to y100.
This sometimes does not happen, and it seems to depend on X and Z coordinates too, because I could not get it to happen in another place in the world. I've attached an image with also the seed in case it's needed to reproduce the bug.
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We're tracking this issue in MC-236633, so this ticket is being resolved and linked as a duplicate.
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