Well since the tides are effected by the gravitational pull of the moons (or the presence of the Primal Leviathan) then of course water will be disappearing and appearing in different places as the "moon" comes closer too the planet it makes since; either that or there slowly deleting stuff off the server to make it easier for 2.0; or it has to do with Leviathan, but I vote more for my first statement.