Setting the Owner property to null in order to detach the minimize behavior of linked RadWindow instance to its owner does not take effect unless the RadWindow instance is closed and reopened. Available with the R3 2016 SP1 release.
Available in LIB version 2015.3.1130, it will be also available in the 2016 Q1 Release.
When creating a Word plug-in project for example, after showing a RadWindow instance moving that window by dragging it causes NullReferenceException. Available in LIB version 2016.1.222, it will be also available in the 2016 Q2 Release.
The issue is reproducible when the DPI is changed at runtime(new feature introduced with Windows 10) and therefore the application is not notified for the change. In order the application to be aware of the change the user have to logout and sign in (or the application should be DPI aware).