Meta titles show visual composer blocks instead of content

[NortenWeb]

Hi I am having problem with Visual composer it shows its blocks in Yoast SEO preview window instead of real content
here is the screenshot. http://www.pixhoster.info/f/2016-07/9ccac26229e1571574090eefe6187fef.png

I solved the issue by setting the default values in Yoast SEO for meta description. But this is just workaround not a real problem solving.

I intend to use purchase your theme for another project, so any help on this would be appreciated.

Ticket