On further testing, it looks like Google Maps will never "invoke" to the same location.

Example:
1. launch maps to location A - works OK
2. Launch maps to location B - works OK
3. Launch maps to location A again, this fails (maps remains on location B)

Another example:
1. Launch maps to location A
2. Move the map display to another location
3. Launch maps to Location A again, this fails (maps remains focused where you left it)