Hello,
Thanks for reaching out to us. Please use this css in your custom css: To add it you can follow this guide: https://www.joomshaper.com/documentation/helix-framework/custom-code-css-js-meta
@media only screen and (max-width: 568px) {
    .sppb-addon-table-main.bt tbody td::before, .sppb-addon-table-main.bt tfoot td::before, .sppb-addon-table-main.bt tfoot th::before {
        width: unset;
    }
        #sppb-addon-1736206449137 .sppb-addon-table-main.bt tbody td:before, #sppb-addon-1736206449137 .sppb-addon-table-main.bt tbody td:before, #sppb-addon-1736206449137 .sppb-addon-table-main th {
    background: unset;
}
}
Thanks