11-20-2015, 07:32 AM
(This post was last modified: 11-20-2015, 07:32 AM by PureTryOut.)
Yes it is replicable, I just did it again, using Cuberite development build and WorldEdit-master. Although it does not seem to have anything to do with the water, but rather the lowest layer.
Basically: every block in the lowest layer stays the same (so is ignored by //undo).
Basically: every block in the lowest layer stays the same (so is ignored by //undo).