Woocommerce product attributes not working on iOS

I have an e-commerce website build on wordpress/woocommerce. lots of products are there and each and every product has different attributes related to product. Every thing running well till yesterday. But yesterday I update wordpress as well as woocommerce.

My current version of both are Wordpress - 4.2.1 and Woocommerce - 2.4.7.

My problem is after updating woocommerce, product attributes which appear as drop-down not working on iOS device(I tested on iOS 7.x.x and 8.x.x) except iOS devices that attributes are working on each and every devices like android, windows phone, and also different OS.

I am not changing anything in product attributes and I also update table and products after updating woocommerce version. So, why this not working? Is this bug of woocommerce 2.4.7 ? or something missing from my side.

Anyone has same problem? If someone know solution about this please let me know.

Appreciate your answer and opinion, Thanks in advance.

via Chebli Mohamed