In our case, we need to debug while iPhone is connected to the network for some realtime streaming communications. It's insane that debugging is accidentally coerced to go over wifi, which congests the connection that we need to test on. So turning off the network (Airplane), connecting the debugger, and turning on network, is a very cumbersome workflow. Xcode 15.3 debug behaviour is definitely a regression in this regard.

It's still a disaster in iOS 15.