WORLDEDIT-3744 - Reported by sat

hello,

I'm on paper, but spigot has same bug
i'm on worldedit 3908-dd2fcba

on use of //drain on water, if a waterlogued bloc is in area all water are removed on first time, but in segond time a flow of water reaper form bloc waterlogued.
i'm take screen for explain.

after '/drain' water flow from the waterlogued block.