FAQ: HTML5 WebEngine local variables are mirrored to all clients?
Variables used in the WebEngine are mirrored into all HTML5 Clients.
If a HTML5 Client has write access, it can alter variables for the native Service Engine and all connected HTML5 clients even when the calculation of the variable is set to "local".
If elements are adapted dynamically by a variable, all clients will see the changes in their HTML5 WebEngine.