"New Qt Quick Application" dialog freeze

"New Qt Quick Application" dialog will freeze when operate as follow steps:
1. "File" -> "New File or Project", then pop up the "New" dialog
2. Select a project template and click "Choose...", then pop up the "New Qt Quick Application" dialog
3. Select some letters(i.e. "Qt") in "Create in" line editor, then focus on "Name" line editor
4. Focus on "Create in" line editor and Select some letters again, then focus on "Name" line editor too
5. Repeat step 3 and 4, then "New Qt Quick Application" dialog will freeze