Hello again, i have found a work around for this, which works since two weeks on my xbox x:
- After starting the xbox normally and before clicking on the game icon, i go into the velocity one flight menue and deactivate the rudder under “accessories” (lights go off and on) 2. Then i start the msfs2020 normally 3. During the last booting sequence of the game, when you actual see the last game content liverages etc. and the blue loading bar is around 5o % done, i activate the rudder pedals again (accessories again).
Naturally don´t want to do this for my life and that there will come an offical fix for this;-) Hope it works for others too 
best regards norbert from germany