I prefer the Lock mode than the Legacy mode. But both have problems in different planes.
In lock mode, the following aircraft’s heading and speed knobs don’t do anything. It doesn’t matter whether autopilot is on or off. Also, In the 747, the Heading Hold button gets stuck ON, but regardless it’s only possible to change heading by disengaging autopilot and manually steering with the joystick. This is true in the following planes:
Airbus A320
Boeing 787
Boeing 747
Both Cessna Jets (CJ4 and Citation Longitude)
These are only the ones I know don’t work, haven’t tried them all.
Also, I’ve found that, after landing and parking, I cannot turn off the airliners even though
I shut off all the electrical circuits the plane remains powered. This is true for the A320, the 787 and, I think, the 747.
The only plane I’ve flown, so far, that does work correctly is the Beechcraft Bonanza G36. But this plane has some graphic glitches that puts weird artifacts in the sky.
I’ve had this problem in B747 for many months. I solved it quite accidentally:
if I press the heading button with the right button on the mouse for a few seconds it starts working! What’s more after that it works normally
Attention: sometimes it takes 2 or 3 attempts at first.
Hope it works for all of you guys