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We're trying to get Google Tag Manager to work in our Vaadin project. We basically recycled the idea behind the existing Analytics Plugin https://github.com/samie/vaadin-ga-tracker and instantiate the extension in our UI.
The GTM script is loaded, and we can see the the GTM debug frame when "Preview" mode is active, but the whole Vaadin application is gone as soon as the GTM debug frame appears (it can be seen for a very short time).
The application is still there it seems, but not visible (see attached screenshot). To ensure that it's not an error in our application: I could reproduce the issue in with the Addressbook Demo App.
Anyone got some experience with Google Tag Manager and Vaadin?