There are scenarios when RadWindow shouldn't bring to front on user interaction. This is not connected with the Owner or IsTopMost properties.
Add support for bringing to front between RadWindows. For example - alt + tab.
Also when show the Window and make the browser smaller this also doesn't shrink the Window but let it out of the application size and if the browser is resized and the window is restored after maximizing.
If you minimize initially maximized Window and restore it after that - the Window doesn't maximize back.