MSFS Incorrect Flight Start Location Loads

Over the past week I experienced something I had never seen before.  When I go to World Map to select a flight's origin/gate, the airport that is displayed on the map is the destination airport of the previous flight, and this has happened multiple times.  The PC is rebooted between the previous flight and when this problem appears so it's not a "leftover data" problem.  I work around it by selecting startup airports at random until eventually the correct airport displays on the map.  Has anyone else experienced this ?  This problem is unrelated to SU15 as it has happened before SU15 arrived and now with SU15 (sidebar: SU15 is looking good, keeping fingers crossed !).