Hello,

Please disable the “Icon on mobile” option in the layout while editing the order by widget and check the issue.

If you want to use the icon on mobile choose the style underline and add the following custom css in Theme Settings > Custom CSS > Custom CSS for Mobile Only.

.wd-shop-tools .woocommerce-ordering.wd-style-underline select  {
    color: #0000fc !important;
}

Best Regards.