Hi,
As we are not able to reproduce this issue on our side. We will need credentials of affected website for further troubleshooting. Please arrange the same for us.
You can download the previous version of our plugin on live website for the time being.
Here is the link: https://downloads.wordpress.org/plugin/responsive-menu.3.1.25.zip
Please keep in mind if you go ahead and use the previous version we won’t be able to reproduce the issue and fix it. In that case we will need a staging version of your live site.
Regards,
Kriti