I just tried to use the combination of a Seeeduino Lotus board with the Adafruit Motor/Stepper/Servo Shield v1.2 & have found no power is supplied from the Motor Shield to the Lotus board below irrespective of whether the power jumper is used or not.
I confirmed all was OK when I replaced the Lotus board with either the Seeeduno V3 or a UNO board.
So not sure why power is not passed through to the Lotus board