CDN and VC Post Grid cacheing problem

Hi,
I am using CloudFront CDN with W3 Total Cache and Visual Composer.
I realized that all files that are loaded through VC Post Grid have relative links to images like “PageName_files/image.jpg”. As those images are not on standard url for images wp_content/upload/Year/Month/IMAGE.JPG they are not replaced with CDN Url and not pulled to CloudFront CDN. Is there workaround for this situation?

Cheers
Z.