This issue only occurs for me when using List. My solution was to use ScrollView with LazyVStack as this will call onAppear for every row.

I can reproduce this on a fresh clone of my project. I'm still trying to determine what is missing.

I have the same issue where appending to the path for a NavigationStack and seeing "Update NavigationRequestObserver tried to update multiple times per frame." I can't reproduce it in a simple app but in my real app I have this message and 100% CPU usage and freezing issues. If I can determine a cause I will update here.

Another way to do this: struct Parent: View { @FocusState var focusedField: UUID? var body: some View { VStack { Child(focusedField: _focusedField) } } } struct Child: View { @FocusState var focusedField: UUID? @State var someText: String = "" @State var someTextFieldUUID: UUID = UUID() var body: some View { VStack { TextField("Focusable field", text: $someText)             .focused($focusedField, equals: someTextFieldUUID) } } }

I narrowed this issue down to a single SwiftUI file that causes the problem. When I remove this file the build completes in under 2 minutes. There is a simple code fix for this issue by moving about 10 lines of code into a view it seems to solve it. I submitted the Xcode project using feedback assistant. The code is too long to post here. I am working on reducing the code down so I can post it once I get to that point.

Seeing the same behavior with Xcode 13 GM. My project will not finish compiling and doesn't show any errors. If I stop the build I see "Command CompileSwiftSources failed with a nonzero exit code"

Just installed Xcode 13 beta 4 and my project doesn't finish building. Builds fine on Xcode 12. I also noticed that Swift 5 is the highest version available in the build settings.