Hi Predrag,
I no longer need this functionality now as I have redesigned my page. However, I am curious to know if there is a solution to this for future reference. To answer your question, it was a static page and the two sidebars were set up in widgets as custom sidebars. In the divi builder I selected a custom sidebar for one section and the other custom sidebar for a section lower down. It worked fine in Divi but not in the browser – the browser displayed the same sidebar for both widgets.
Any thoughts?