RX Elements won't render when exporting with fast bounce

Hey folks,
 
I recently purchased the iZotope Elements Suite.  The only plugin in the suite I've tried to use so far is the RX Elements plug in.  When I add it to a track and playback in real time, it works as expected.  But I found when I was bouncing the project the usual way, all the noise that the plugin was removing was back and audible in the exported file.  The only way I could export with the plug-in working was via a real-time bounce.
 
Is this just the way this plug-in has to be used, or is this a bug?  Anyone know?
 
Bill.