This is a known issue, been around since the game launched on PC and currently affects all airliners default, deluxe, or 3rd party (as all 3rd party add-ons available for Xbox use default avionics at this time).
This thread is dedicated to the issue:
Oops - didn’t see how old the rest of the thread was - anyway, the update on the bug getting fixed is as clear as mud - as far as I can tell…