I have similar problem here! The controller USB port seems to have lost fixed position and its a bit loose, resulting in only charging the phone (and only if I apply some light pressure from one side), but fails to be recognized by phone. I had no major incident with it (like phone dropping or uncautious movement), and I don´t think this part is properly robust to avoid this thing to happen.
Anyway, my drone is still on warranty, so I´m thinking on returning for being repaired. Problem is Fnac (from where I bought it) it´s asking for complete product return (including drone), and I´m still able to use flying it with my phone directly (not using the controller), so I would want to return only the faulty part.
Do you think Parrot will take responsibility on their product or they´ll try to claim improper use (what I know that it´s not). Have you heard from other problems with Parrot support service?