Thanks for your patience.
We have deprecated the Silverlight platform support. And we have stopped shipping assemblies for Silverlight platform from the version 188.8.131.52.Also we have analyzed the reported issue with opening filter popup in the last released version (184.108.40.206) and we are unbale to reproduce the reported issue. Please find the tested sample from the below linkSample link:If you are still facing the same issue, please revert us with the clear requirement and the platform that your using to build the application. It will helps us to investigate further and update you with appropriate solution at earlier.