I am using Telerik 2012 Q3 (.NET40) in a web application. The last few months, I am getting occasional bug reports about broken functionality. I have been able to trace this down to a radWindow not opening in a pop-up, but in fact replacing the complete page. Users claim they open the page by clicking the designated button and this is confirmed by the URL in the address bar, showing a query string like ?rwndrnd=0.8599367708780101. For them, the bug occurs sometimes.
Unfortunately, I cannot point to the actual web application, as it is non-public.
Has this behaviour been seen before and is there a solution to it?
I use the following code to open the radWindow: