When Pandora is playing the screen goes blank sometimes I have to hit the home button on the appradio 2 and push on Pandora to open back up hopefully there is another update soon.

I had this issue with my 4S/30 pin setup. Spent weeks and months with Pioneer to resolve the issue. I found a solution myself. You need to leave the AppRadio app up at all times, including when Pandora is running, Pandora will work just fine on the AppRadio. What I found was the AppRadio unit kept trying to launch the AppRadio app, even while in Pandora mode. So the black screen is the units change in channel.

I hope it helps!