I had trouble getting some Airbus aircraft to move once the engines were on and thought it was another bug, but it turns out it was only that the toe brake axis was reversed by default (which is a bug in itself, I guess). Stepping on the toe brake made the aircraft move all right (and clicking “Reverse axis” in the controls settings fixed it).
I’ve had this with the T.Flight Rudder Pedals connected via the TCA Quadrant Airbus Edition in the A320 and A400M but it might apply to other aircraft/hardware combinations as well.
The more you know