Hello,
1) It looks the issue appears for the iPhone only. We need some time to sort out how to fix it. I’ll inform you.
2) Add the below code to Theme Options > Custom CSS
.woocommerce-ordering select {
width: 180px;
font-size: 18px;
}
3) Enable tabs and related products for the single product in Theme Options > WooCommerce > Single product > Tabs, Related products.
Regards