Glad it worked for you. IMHO, this isn’t a bug in the Garmin, but a major issue with the flight planning logic in the sim. The sim sometimes seems to have issues assigning a transition if you set up a flight (direct IFR) to an airport if there’s no intermediate waypoint. Other times it has an issue transitioning from a SID to your first enroute waypoint. I’m sure The MS and WT folks are fully aware of the sims issues with making consistently good flight plans, and how thats impacting the use of the outstanding Garmin units they’ve given us. As they say, you can’t get to step 500 without doing steps 1, 2, 3……
Anyway, glad you see what the sim’s doing and understand the logic to get it to do what you intended it to do.
Regards
P.S. just FYI here’s a link to some comments by Bishop398 from WT concerning this issue and some other issues