Beech Bonanza G1000NXi v0.9.2. Built the Flight Plan in World Map.
Started at the ramp, cold and dark. No flight plan. = (
Same set up. Started at the runway, system on, ready to roll. No flight plan. = (
Uninstalled G1000NXi. Beech Bonanza G1000 stock. Built the Flight Plan in World Map, same set up as before, same route (KDET METRO3.DUNKS KLAN) same altitudes.
Cold & dark at the ramp:
Bonanza G1000 stock, runway spawn, system on, ready to roll, same world map set up:
Confirmed - looks like you found a G1000NXi bug. Issue is not present in stock G1000. That being said, I would happily have built the route using the NXi, having never discovered the bug because I like to do the full FPL load myself, as if I were getting ready to fly in real life.