Hello @gsheld,
When JavaScript minification or combination causes interactive elements, like sliders, to stop responding, it usually means one of the sliders’ scripts isn’t compatible with being minified or merged.
The easiest way to resolve this is to exclude the scripts related to your slider from the JS optimization features. Since every site uses different themes and plugins, I can’t point to the exact file, but you can safely test exclusions using the steps in our guide here:
https://eu.siteground.com/tutorials/wordpress/speed-optimizer/frontend-optimization/#minify-css-js-html
Look for the section on excluding JS files and try adding your slider’s main script(s) there. Most sliders load files with names like slider, carousel, slick, swiper, or similar—those are good starting points.
If you have a SiteGround account, I recommend submitting a support ticket through your SiteGround dashboard. This will allow our support team to assist you more directly and efficiently.
Best regards,
Miroslav Tyurdiev