Vaadin plugin works even if all the Vaadin modules in OSGi are stop


I have been following this example

and got my Vaadin plugin to work with only vaadin-themes and vaadin-client-compiled in the lib folder. Every thing else (i.e. Vaadin client, vaadin server and vaadin shared) are installed in karaf.
Now, the problem is that when I stop all these vaadin releted bundles in karaf and start and stop my bundle then still my plugin works. I tried it in diffferent browsers, did hard reload and emptied the cache. But the plugin still displays.
So, my question would be why is it working and from where is it getting the vaadin server.