walking on the water

PenguinOP

(sorry for my bad english)
I have discovered a glitch about how to walk on water

I have a video

Version 21956 Aug 2015

https://youtu.be/6yq4syi-vFg

Confused

I thought we had fixed it but in testing this weekend it came up:

https://trello.com/c/nsAXwohx/1229-21956-removing-hatch-from-rooms-causes-walking-on-sea-floor