This bug has been fixed in 21w37a
Confirmed for 1.17-pre1
This bug is not a duplicate, as was already previously stated. Furthermore, the bug still affect 21w18a whereas the bug it allegedly duplicates has already been fixed.
Can confirm for 21w17a
Can confirm for 21w17a
Can confirm in 21w17a
Done.
Never mind, it seems to have been caused by terrible internet
Can confirm for 1.19.1-pre4