Hovered property stays when popup is opened from drawer

In attached sample application, one can see that button is highlighted when hovered over:

Once user clicks on the button in the main view, the highlight of main view button disappears as a modal drawer opens:

But when button in the Drawer is clicked and a modal Popup opens,  the highlight of the button in drawer does not disappear (please notice that the mouse cursor is away from the button already):

In fact, the button still behaves as mouse was over it and shows a ToolTip, even though the mouse moved away over a second ago! (Tooltip stays forever unless the Popup is dismissed.):

After closing the Popup, the button is still highlighted. (Moving mouse over it will not trigger a ToolTip until user moves mouse over button, away from button and again over the button.)

Opening the Popup from an identical button that is positioned in the main view does not cause this issue:

• Highlight is lost
• Tooltip is not shown

For the bug to appear, the button must be positioned into the Drawer: