Qt Designer,Creator: Can't correctly saved change the size of the activex control, and need to reset controls after open a project.

1.run Qt Creator
2.create a "Qt Widgets Application"
3.add "QT += axcontainer" to .pro file
4.put a "QAxWidget" to "MainWindow"
5.set a visible ActiveX controls for "QAxWidget"
6.save all file and close "Qt Creator"
7.run Qt Creator again
8.open the project and modify size of "QAxWidget" on "MainWindow"
9.save all file and close "Qt Creator"
10.run Qt Creator again and open the project,the "QAxWidget" become empty,and must set ActiveX agaion. This is a bug,the "Qt Createor" can't save change the size of the activex control.