A long press of the Master Mode Control Button draws the layout of the Air-to-Air mode on the HUD, irrespective of the aircraft's current configuration (no power, IFFCC turned off or both off, after engine flameout with no other power sources selected or on the ground).
I used the stock "Free Flight - Ramp Start" mission, but it happens in any.
At the very beginning, you can see the "Note" alert flashing at the bottom of the HUD, I was able to clear that with the TMS left.
Version: 1.2.2 latest (as of 24th Nov)
Track and screenshot attached, pay attention to the MMCB.
Nothing except a Hog needed to recreate ;)
Hope that helps,
Super-
. IFFCC Bug.trk