It has been a while and I thought I would post a little update on the progress made so far.
I took my car into the dealership who initially could not locate a fault although they could re-create the issue with their own phones. They tried to return the car and close the case claiming the problem was un-fixable. Naturally I rejected this outcome as the car is not yet 2 years old and still within the warranty period.
The dealership after a little persuasion have replaced the two GPS sensors in the car. This did not resolve the issue.
A short while later the dealer called me up about a recall. I then had to return the car again to the dealership because of a recall for the rear mounted GPS sensor was insufficiently insulated and was subject to water ingress. They replaced the sensor as part of the recall and this made no immediate difference.
I have been in contact with the dealer again who would like to apply the latest version of the software on the MIB3. I am currently waiting for an appointment.
However, here in the UK we have had a rather hot and dry spell of weather. It has been weeks since I have driven in the rain and longer since the recall, and the temp has been as high as 38 a couple of weeks ago. In this last week, the problem seems to have disappeared. Not gone wrong once on over 600 miles of driving. This to me hints as water ingress. Not sure if the last recall fixed the problem and the residual moisture has all dried out, or if there is a different water ingress issue. I guess I will find out when the weather turns more British
