Get the orientation of the text

Hello everyone,
I am trying to read the orientation of the text with TextObjectPlane. The problem that I have is when a text is rotated and bring back to the original position the return I have is ((0, 0, 0), (0, 0, 0)).

Any ideas for this problem?

plane = rs.TextObjectPlane(texto)



I suppose that is a bug, because that in rhino 5 it doesn’t happen.