Cannot Build Underwater

[Morjimoi]

I can't build buildings underwater regardless of how deep I am, or even if the building has the necessary support for it. I took a video of it to hopefully remove all reasonable doubt about this; 

https://www.youtube.com/watch?v=newzr0u1eFw

[Mr. Mortius]

Bump / seconded / gotta make this post long enough

[Deantwo]

I could place a biodome underwater, but I couldn't add a building so I could fetch materials for it. Maybe I can build a road down to it.