Hope it helps what I found out.

If car stands still, both modes are available in 3 D: travelling direction and pointing north.

A soon as car moves only pointing direction mode in 3 D is available

F.E.: Car stands still, 3 D pointing north works well, car moves and immediately 3 D North switches automatically to 3 D direction.

Is this the reason for different posts?

MFG SLIA