During my current flight from EGLL to WSSS, I notice that the global map fail to update along the route. It either presented as a black spot or as a low resolution terrain. Has anyone encounter the same issue during long haul flight? Previously, I also flew similar long haul flight on the same route either EGLL/WSSS or WSSS/EGLL or KSFO/VHHH or KLAX/WSSS but never encounter the same problem.
Will be very much appreciated if anyone of you can offer some solution/ suggestion to address the issue.
Thanks a lot.