I am building an app that sometimes has multiple layers of dialogs - for instance a button launches a dialog, and in that custom dialog there is another button the launches another custom dialog etc. I have recently had an issue where suddenly the test mode will dislike that and just not show anything. The page is there because you can see the components in debug, but nothing shows. And if you publish to web, the actual application works fine.
It is really annoying you essentially have to change your app architecture so you can see things in test mode!
Any clues?