Client can't use ButterBelly drop-down menu in iPhone 5s

She says the menu works fine on iPhone 6, and it works fine in my iPhone emulator, but it doesn't work on her iPhone 5s. Here is her site.

http://www.turningleafacupuncture.com

Any ideas?

 

Hello !

Please check this in another iphone 5s.
http://mobiletest.me/iphone_5_emulator/#u=http://turningleafacupuncture.com/

Thanks & Regards
Pramod

 

Thanks for checking. I'll see if my client knows anyone else who has the same phone. If not, I'll have to assume it's just a problem with her phone.

 

Hello !

Let me know after you will have checked.

Thanks
Pramod Patel