Confirmed on 1.20.6
Can confirm in 22w16b
Seed: -5577804960544527884
Location: /tp @s 1403 -41 -936
Adding to this, if a root block grows where the propagule was, it will not be waterlogged.
I'd appreciate if a mod could delete this issue since it isn't related to vanilla. I didn't mean to cause spam, sorry!
This also happens when removed with the fill command.
This historically also applied to leashed controllable mobs held by one player and ridden by another, namely boats and horses (likely others). There’s likely a bug report for that behavior already