use GTN750 as pop-up causes default X530 freezes at place

[AngelOfAttack]

Kinda weird and minor bug, but when I use GTN750 as a pop-up as the aircraft not support it natively (or legendarily), while all working fine (HSI, AP NAV mode all follows fine). The default X(GNS)530 have it's aircraft position frozen at starting position all long the flight, it'll sync the route in GTN750, will show correct TRK, but the position just not move.
Is this a bug or is there a setting to change this behavior?