V-Ray 4.10.02: Alpha issues with refractive objects

Hey guys, please take a look at the attached images. In the first one, you can see some grey areas of a glass object leaking through. I have no idea why this is happening, because there are a number of solid objects behind the glass parts. So the alpha should be white, as shown in the second image, right?

Regards

Oliver

It would be best to send the scene itself to support@chaosgroup.com so we can analyze it thoroughly.