Did you ever solve this? I am getting it now.

I ended up having to map the data into a new dictionary that miraculously stayed intact when floated up to the SwiftUI layer. Maddening beyond belief. Combined with a Switfui gotcha I wasted about 8 hours doing something that would have taken me 15 minutes in UIKit and ObjC.

same here. I never noticed that it was stuck on wireless debugging and wondered why it'd take a minute to start the damned thing, or 3 or 4 seconds per step in the debugger. My "solution" was to simply restart the iPhone while connected. I have to do that from time to time but I gladly spend 1 minute every couple of hours instead of losing the 15 minutes or more per hour just waiting....and w a i t i n g.......

Ibid. But with XC 13.2.1. And the mapView is built up in the storyboard, and not direct action on part of the my code. And its very sporadic.