Seems to be fixed in 25w42a
The issue you linked is about adult nautilus subtitle. This issue is about baby nautilus subtitle
Annoying bug. Especially when pickblocking doesn’t work like it does for item frames (https://feedback.minecraft.net/hc/en-us/community/posts/39313408512781). The only way I’ve found to do it is to change gamemode to survival. Really annoying.
What then? It’s still a mistake.
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Same issue with 1.21.81 on PS5.
I created new world (survival with commands, superflat without buildings) in 24w36a and tested placing water and lava. Both buckets converted to empty ones.
As said in the description, I’m playing a local splitscreen multiplayer. The problem occurs only for the second player; the first can change gamemodes.