PC simmers had a similar problem after an update way back when, Asobo changed control settings and we had to then make sure certain switches were included in the controller’s settings for our TCA Quadrants, etc.
If some of these switches were not in your settings the Avionics would go black/off 3 or 4 minutes into the flight.
It could be the same problem on the Xbox?
I posted a picture of the settings for a King Air in the link below, but they are required for nearly all aircraft.