Tap sensor reports double as false. Procedure of test is as follows.

1. Add a tap senor filter to QSensor.
2. Start the tap sensor.
3. Double tap on device screen.
4. Print QTapSensorReading::isDoubleTap() value.
5. Stop the sensor.

The value printed from isDoubleTap() is always false even when double tap is made on the device screen. The tapDirection() is always 4 for all direction taps.