I know my dear, that this game is a simulator.
But this simulator has been released very early! The fact, that major bugs occur also with, not only other sims, but also generally speaking in othe big softwares as well, is actually not participating in a huge beta Program like Microsoft does!
Microsoft has established a complete alpha and beta program and I myself am a Microsoft insider.
This alpha and beta has taken a huge part and for a long time simulation with true pilots and many experienced simmers around the globe. A lot of users reported these issues and yet Microsoft released the game without fixing them!
And as you said, this is a SIMULATOR! It should include most of the functions in a working condition.
So in short: the game was released early and Microsoft should fix all issues sooner as they might plan, or simply refund us back our money!