I have an Android tablet on which I have installed the Zymurgy app. It works correctly when I have a WiFi connection. I have downloaded several issues and can browse them as exepcted. But when I turn off WiFi, or am not connected to one, the splash screen displays, then I get an error dialog titled "Search Failed" and the text "A valid internet connection was not found. Please check your network connections and try again." After I click OK, none of the downloaded issues are shown. I thought it was supposed to allow offline reading of Zymurgy?