Hi Raj,
We have done memory profiling to ensure that we cover the usual scenarios and we properly allow instances to be garbage collected. However, there might be scenarios that we didn't find or a regression that we introduced recently is causing this. Also, it could be the plugin that is not properly cleaning up references that it doesn't need.
Please use WinDbg to track the leaks and let us know if you find anything that points to the shell app.
Thanks,
George