Won't kick over after moving, briefly

[frailer]

Have posted this in Aussie area, but figure I should throw it 'out there'.

This has happened twice. Wife moved car from street to drive. Subsequent no-start. 1st time NRMA guy cranked and 'pedalled' it until he got it going.
This time she eventually managed to do it herself.
After the 1st time, got dealer to check at service for any error codes. None.

My theory is that she has quickly started it...rich mixture hasn't had time to get burned out before boing switched off.. Creates a too-rich mixture on restarting, as more 'startup' mixture being pumped in. Only a theory; but, if anyone has any ideas as to how to prevent it. One experienced person said that he always waits for the 1st round of dash-lights to go off before cranking. Maybe that would help.