I have a SwiftUI app that works perfectly fine on the version prior to the new 11.3 update. The app has a List and on clicking an entry, opens the child view which has a toolbar. This app has been working fine for months now, and once I upgraded to 11.3, the following happens the app opens fine it even loads the entries into the list view when I click on the entry, the right side is "empty" - no toolbar, no content. But the View is loading! (because the debug statements from the view onAppear are executing) I have absolutely no idea where to even look. Has something materially changed in SwiftUI or Xcode that would break an app like this? There are no error messages, warnings etc. - nothing. The child area just stays empty... that's it. I have a MacBook Pro which I haven't upgraded to 11.3, and the app works just fine there. I've recompiled with the latest Xcode etc., no use. Looking for any hints, thank you,

Has anyone used the new SwiftUI 2.0 TextEditor with a sizeable string? I'm currently trying it with a 400K text string and typing into the TextEditor horribly slow. Each letter I type takes seconds to appear. When the text size is small (say just a few thousand characters) it's fast - so it's clearly something to do with performance. Is this a known issue? Should I be doing something to improve it? PS - I do need to use it for my app (for e.g., a Markdown editor that loads a large file)  if let t = try? String(contentsOfFile: filePathName, encoding: .utf8) {             editorText = t             Config.logger.debug("EditorView.onAppear: Read text count = \(t.count) characters")             }