Mission Planner Android crashing when LW20 I2C/Serial rangefinder added

I have not been able to find the issue with this, I have the latest Ardupilot load installed also latest Android MP. Works fine through Bluetooth - until I enable LW20 rangefinder. Using 57600 baud. Bug in Android version of MP? Works fine in Windows version. I cann’t provide any error report because the MP crashes.