I’ll take a chance reviving this thread. My experience of the Fly hang is this.
An aircraft that is in the hangar, i.e. been flown previously, then used to fly again, will cause a hang.
If you change the aircraft to something else in the World/Globe then I’ll get a clean ‘Fly’. I get this with SWS RV14, Milviz C310 and others I can’t recall. So far default aircraft don’t seem to be affected. Does that ring any bells?
Not for me