Qt for android QWidget and quickWidget combined with keyboard input the program crashes

In the Qt for android environment, I created a new mainwindow project. I dragged a quickWidget and QLineEdit control under in QWidget. Running the program .Click on LineEdit. After the keyboard pops up, Input content. clicking on the QCombox. program will crash (only the problem is caused by the combination of quickWidget and QWidget and when the keyboard pops up )