I have had 2 +4’s with an immobiliser (both 2008 cars) and this was a regular issue. Someone mentioned to use the model ignition on, wait for all the whirring and clicking to stop as the car sets itself, by then the codes will be exchanged with the key transponder and the car will start.
Never had it happen again after I gave it the few seconds time to ‘set up’.
My current 2012 4/4 is the same.
BR
Colin
