At startup, the networkmanager is not present in system tray, an empty space is shown instead. Clicking on the empty space leads to no result, so it's not a image issue. To restore the networkmanager widget, I have to go into system tray configuration, where the network indicator is active, turn it off, apply, turn it on again and apply again. This only lasts until next login. Reproducible: Always
*** This bug has been marked as a duplicate of bug 348648 ***