QTabBar::moveTab messes the tab bar rendering when moving the currently selected index

When calling moveTab on the current index the tab bar is incorrectly rendered in various parts.

I attached a small application showing the problem, along with 2 screenshots.

The application displays a tab bar with 8 tabs and a "Test" button (before.jpg). When the button is pressed, the current index (which in this case is 0) is moved to position 6. At this point index 0 shows a selected close button but not a selected tab, index 6 is selected but shows a disabled close button and index 1 shows no close button at all (after.jpg).

I've tested it only on Windows 7.