If the shutdown happens while route-planning again, then I will have to start testing it with 1 map at a time. There has been 2 unexpected shutdowns so far, and doesnt happen often.

As for firmware Im using the latest one. I'll only downgrade firmware if the shutdown problems keep occurring even without the additional maps added.

Question: The official Garmin maps:
City Navigator® Middle East NT
City Navigator® Middle East & Northern Africa NT

have overlapping countries. If these 2 have different versions of the same country should I be concerned?