I had an interesting (to me) failure of the right nav radio failing to change frequency using either the centre console boxes or the FMC/CDU Tune page. The remote frequency display on the right seat instrument panel remained on a random frequency and the nav instruments did not work. It gave a failure mode to the sim which caught me out!, I was a bit slow catching on (but did OK in the end). Exiting 2019 and re starting did not fix this, it needed an iPad reboot.
To be honest I’d like more of this. The 737 needs audio idents, it would have been a pretty big clue.
2 year old iPad pro 9.7”
Anyone else see this?