DroidPlanner Disarms, why?

Hello guys,

I am using the pixhawk and 3dr telemetries.
I can connect and arm fine to. but when i try to change any mode, or Land. it does disarm and obviously crashes as a rock to the ground. Luckily i tested it at just 3 feet so no damage.

However, i wonder how this comes. My mobile is a Nexus 5 with Android 6.0 Marshmallow. I tested it with a friend’s phone as well. An Sony compact z3 Android 5.0. He has the same problem.
We were using QGroundControl before. But it’s quite annoying to pick up a laptop all the time. QGroundControl worked perfect anyway.

We are using turnigy 9x and we use HOV PIT for changing the modes. This however works like a timer and does overwrite the settings of qgroundcontrol all the time. Not that it’s a problem. But i feel like the radio controller is giving issue’s.

Hopefully anyone had this problem or knows how to fix it.

Don’t hesitate to ask any questions

Thank you in advance! :wink:

It’s DroidPlanner 2 by Arthur Benemann by the way.
Tower does crash for me at the start, yes i installed 3dr services.