I have problems with media management with the WPML media translation plugin.
I need to replace a background in the English site home and use the WPML translation plugin. Replaced the background, in the English home continues to be displayed that used in the home of the Italian site and not the one replaced.
WPBakery adds bg as the parameter in the page code http://prntscr.com/krmgno so, if you created translation before media translation I suppose you won’t get the changes. Try to change the bg using the manual translation editor of that page instead of Classic WPML translation editor and re-add bg image for the section of the eng translation. Or contact WPML support, maybe they have some better solution for you.