When creating a single instance app, after redirection it is necessary to call the Win32 API SetForegroundWindow as well as Window.Activate to show the redirected-to window. See related issue - #1439. It should not be necessary to do a DllImport and call a Win32 API. WindowsAppSDK should provide this functionality. Either Window.Activate should call it by default or provide a separate method on the Window or AppWindow class called SetAsForeground or similar which calls SetForegroundWindow.
When creating a single instance app, after redirection it is necessary to call the Win32 API SetForegroundWindow as well as Window.Activate to show the redirected-to window. See related issue - #1439. It should not be necessary to do a DllImport and call a Win32 API. WindowsAppSDK should provide this functionality. Either Window.Activate should call it by default or provide a separate method on the Window or AppWindow class called
SetAsForegroundor similar which calls SetForegroundWindow.