Dear Teleriks,
I Opened a window in modal state and then opened another model inside/over it. Everything is ok except on closing the top most modal window. After closing the second modal, the first modal gets the focus but indeed it is overlaid with some transparent divs which causes no action at first click on the first window content. After the first click, these divisions disappear and makes the window's content to be responsive.
As I checked with Chrome Developer Tools , After closing the second modal window , the following tags remain on the page
These tags will be removed after the first click