CONNECTION PROBLEM SOLVED FOR ME
Well I have been using the Samsung Tab s2 with my P3P for some time without a connection problem with Go App and Litchi. Verizon required me to do an update and then the problems connecting began. Here is a pretty easy fix that works awesome for me. I follow these same procedures for both Go and Litchi.
I don't change any USB settings.
To Begin With, Check These Settings
USB debugging shut off.
Apps should not be set to default automatically
Make sure all notifications are on except "priority" in both app settings.
The to get connected
Start off with both apps forced stopped.
Turn on rc and the bird.
Touch the tablet to the opened screen.
Connect tablet to rc.
The selection screen for Go or Litchi should appear.
Select the one you want and hit ALWAYS (sets it as default)
The app should open but won't connect.
Touch and hold the side power button until restart or shut down appears and do a restart (not a shut down).
Let the tablet reboot- swipe the screen and the preselected app should start and connect.
Then, When you want to fly with the other app-
Before you connect tablet to rc, make sure both apps are forced shut and clear the one that's selected default.
Do the procedure as was stated above but select the other app and hit ALWAYS and proceed to the restart to get it connected.
Once you do it a couple times its pretty fast and easy.