It depends how long ago you built the site, but we now have a free additional extension for Elementor Pro, which you should download (if you are logged in) from top of this guide page:
https://searchandfilter.com/documentation/3rd-party/elementor/
Please read the guide carefully, as the old method you had to have a filter_next_query shortcode, some javascript, and set it to custom mode, none of which are now used (all built in to the extension).
This will require a few changes to the form and the page setup, but will work much better than the way it is currently setup.
We cannot yet give a 100% guarantee it will work with Ele Custom Skins, but it usually does.
I think this is the issue.