Wrong cursor position after inputting some Japanese with Qt Virtual Keyboard

The cursor position is not correct when I input some Japanese characters with Qt Virtual Keyboard. Here is the steps to show the scenario:

1. Run the QtVirtualKeyboard example basic;
2. Click the One line field, then the virtual keyboard popped up;
3. Select Japanese from the language list;
4. Click the key 'I';
5. Click the second word candidate 'いつも';
6. The word 'いつも' will be inserted into the line field, but the cursor will be positioned just after the character 'い' instead of the end of the word.