The bug
When building up from below scaffolding can go all the way up to block 255 but it then exhibits weird behaviour.
Examples
Video 1 is normal behaviour at y=254
Videos 2 and 3 are weird behaviour at y=255
Additional information
Starting from 19w11a, these ghost blocks create dark patches below where the scaffolding was placed and deleted.
Related issues
is duplicated by
Attachments
Comments


Looks like the server prohibits placing the block, but the client places it, resulting in "ghost blocks".

Ghost lighting now also appears, starting from at least 19w11a
Confirmed for 1.14 Pre-Release 2

Confirmed too for 1.14 Pre-Release 2

Still in 1.14 pre-3, 1.14 pre-4 and 1.14 pre-5

Still in 1.14 Release

Still in 1.14.1 Release

Still in 1.14.2 Pre-Release 1 and 1.14.2 Pre-Release 2

Still in 1.14.4

@ZeNiko13:Β This doesn't happen to me from 20w18a onwards; can you confirm this?

This doesn't happen in 21w44a.

After testing, I can confirm that this bug is still present in 1.18. However, it is less common.

can't reproduce in 1.20.1
I'm resolving this issue as Cannot Reproduce, as there seems to be some general consensus that this issue is no longer existent or as widespread as it previously may have been. Please leave a comment if you're able to reproduce, and we can reopen the ticket. π
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