And from what UltraMarginal was saying - the moon revolves around the Earth in a synchronous manner, (it's rotation on its axis is the same as its rotation around the earth) so that the
same side always faces the earth (
in general).
So what is causing a 22 minute radio blackout? It's not the Moon's rotation, as the landing site will always face the Earth. And it wouldn't be from the moon revolving around to the other side of the Earth, because that'd be a 12 hour gap, not 22 minutes (and other radio sites around the world were tracking it anyway).