Fully/AT - Return to Fully from Android App

I am trying to find a way to consistently return to the Fully browser on my Fire 7 HD. I have Fully setup such that the home button should always use the default start-up URL...but it isn't consistent. Say I launch from Fully into Spotify via an URL tile. If I hit the Android home button, sometimes it goes back to Fully, sometimes I have to hit it many times, sometimes it won't return to fully at all until I navigate around Spotify for a bit. Since the Fully action bar disappears with android apps, just trying to find a way to get back that "always" works. Any suggestions?

I should note that if I stay within Fully, say I navigate to a sub-panel, the Android home button will return to my main panel.