Something’s weird with bushtrips, now for many of them (both community and official ones) I don’t see the name of the airports, what I see instead is e.g. Balkan Tour Leg 1:
from: TT:Balkans.Mission.05 to: TT:Balkans.Mission.14
Also, in the world map, for airports that are included in Bush Trips, instead of the name of the airport I see the same line from the bush trip, so e.g. Rijeka airport (LDRI) shows up as TT:Balkans.Mission.05
Pictures for reference