In the simulator, everything is ok. However, in live preview mode of canvas, no keyboard pops up when I tap in the textfield. Did I miss anything? Or need more codes in preview?Thanks in advance.

I make a toggle to control a textfield in a form. When I run it, I get a piece of warning: invalid mode 'kCFRunLoopCommonModes' provided to CFRunLoopRunSpecific - break on _CFRunLoopError_RunCalledWithInvalidMode to debug. This message will only appear once per execution What could I do to fix it? What's the harm if it's not fixed( App crashes, or...?). Any help will be appreciated. struct ContentView: View {     @State private var toggle1 = true     @State private var str1 = "..."     var body: some View {         Form{             Section{                 Toggle(isOn: $toggle1, label: {                     Text("Toggle 1")})             }             Section{                     if toggle1{                         HStack{                             Text("Toggle 1")                             TextField("...", text: $str1)                         }                     }             }             .textFieldStyle(RoundedBorderTextFieldStyle())         }     } }