Hi Vladimir,
thanks for your answer! I am using https URLs and I’m aware that [su_document] only displays an iframe with Google Document Viewer embedded! As the issue explained above even occurs on a clean installed WordPress instance without any other plugins and certainly using the standard theme I think it has to do something with the shortcode or at least with the plugin itself.. It basically works but, let’s say every third time loading the site, it doesn’t.
What do you think? Could it be somehow security related in the current browser versions that contents of iframe are occasionally blocked?
Kind regards,
George
