Try to add the following code snippet to the Custom JS area on document ready in Theme Settings to fix this issue.

function singleProductTabsAccordion(){
    if ( jQuery(window).width() > 1024 ) {
        return;
    }
    jQuery('.woocommerce-tabs').removeClass('tabs-layout-tabs').addClass('tabs-layout-accordion');
    jQuery('.single-product-page').removeClass('tabs-type-tabs').addClass('tabs-type-accordion');
}
singleProductTabsAccordion();