Problem with #_EVENTIMAGEURL shortcode

I got a problem with the #_EVENTIMAGEURL shortcode.

I’d like to use #_EVENTIMAGEURL inside a style parameter like:

<span style="background-image: url("#_EVENTIMAGEURL");">
   content of span
</span>

This does not work for me as each / (slash forward) inside the url is replaced by this:
=""
(with a space on the end)

So url like this
"https://www.disney.com/subpage"
will be this
"http:="" www.disney.com="" subpage"
instead.

Placing the #_EVENTIMAGEURL normally in the text (not inside any tag) works fine and gives a normal url.

How can i fix this?