Aircraft starts on random runway

[BigCow74]

Make sure it isn’t this new menu setting:

World Map Overiding runway selection

Is this your issue? From the SU14 release notes: NEW CONTENT/FEATURES Added flight plan assistance setting for ATC in the user experience assistance settings so that users can request the ATC to favor their flight plan or world map flight settings over the current conditions. This assistance is set to “Active” by default. Active: ATC will set the active runway and approach for the departure and arrival airport based on the users flight plan or settings in the world map. Deactivated: ATC will…