@SadBucket said in GNS530 issue after latest MSFS2020 SU16:
you can select the KX155B as secondary with the 750. That is what I have been doing.
Of course, but IRL I wouldn't file RNAV IFR routes without a backup GPS unit. And since I fly mostly to smaller airports where RNAV approaches are far more common...
The best solution, of course, would be to have support for a backup 650 or even dual 750s. I note there's an active topic discussing just that.