thank you to your solution!
i have another question with same problem.
I need to set the fullwidth-slider at the top of the content that is above the horizontal menu.
I copied the shortcode from the slider from avia-editor and inserted it into the php code of posts (single).
he works there, but for some reason when it is not in the place where it was inserted. It looks like 2 div-blocks closed (/div) via thrash-from-shortcode and after that code of slider inserted.
I read that WordPress is handled differently shortcode in wisiwig editor and inside php code. But how to handle it?
Thank you!