in my case when activating this plugin it is messing up my sidebar/widget setup. With other words: I am using different sidebars with individual widgets each. And one specific sidebars gets messed up every time I am using this plugin: The widget inside the sidebar disappears. Even when I am putting a new widget into this sidebar again - after a while it is disappearing again (when playing with the settings which theme shall be used for mobile versions and so on).
This is a no-go. Must be fixed.