[17b1557] Roof over deep water when placing adjacent wall

[Kerbin Dallas Multipass]

Those dark blotches appear and are indicated as "constructed roof" when mousing over.

All deep water areas are still default-marked as no-roof zones

[ison]

bump

[ison]

Do you remember how this happened? What happened to the other roofs?

// edit:

If it happens again, then please report it, best with repro steps. Thanks.