Apologize, I misread your post and pointed you to another topic related to a different issue.
I think this is the good report concerning your issue:
To summarize, the workaround is once on the World map, you need to follow those steps in this order:
- select your plane/livery
- select your flight plan if any
- select your gate
If you modify your plane/livery/flight plan after having selected your gate, then you’ll be spawned on the runway.