Qt5 embedded dialog message box rotation problem

Qt5 embedded's dialog message box is not rotated with the same way of their content. 

We set the content show in vertical in the screen rotation, but the pop up dialog message box is still show in horizon.

The expect is dialog message box is at the same rotation with their content. 

We confirm this problem at Qt 5.6.2, Qt 5.8.0 and Qt 9.3.0.