QTabWidget : tab bar overlapped by right corner widget, when we set min-width for it in style sheet and decrease window width.

My widget has two tabs, and has right corner widget seted(The corner widget is QToolBar with lot of icons on it).
I have weird behaviour of QTabWidget, when I set simple stylesheet, (see below) and start to decrease width of window:

QTabWidget::tab-bar {
min-width: 32ex;
}

The result is next:

Even if i get rid of stylesheet, the behavior is not ok, when width became small for tab bar and corner widget:

Looks like corner widget do not resized at all and only tab bar is resized and pushed to left side.

I added simple example TableWidgetTest.zip. Style for QTabWidget::tab-bar is in MainWindow.ui file.