@ibanlopez I’ve just been investigating jquery being called twice on my site, and for me it was another plugin (beaver builder) via FLBuilder::include_jquery which produced the /wp-includes/js/jquery/jquery.js one.
So I removed it remove_action('wp_footer', 'FLBuilder::include_jquery'); and add_theme_support('soil-jquery-cdn'); still works nicely to produce beautiful code!
I guess I’m saying how do you know it’s Soil causing your double jquery problem…