Hello,
1) I checked your site using mobile device and also don’t see problem with the footer https://prnt.sc/xb55ye
Could you, please, provide us with the screenshot or video of the issue?
2) Did you try how the plugin works with the default WP theme? Go to Appearance > Themes > install and activate storefront theme for example and check if scroll works ok. Let me know about the results.
Regards