Shopify Un problema ocurrió repetidamente en URL

It's a Safari issue, not a Shopify issue. You can replicate that on OSX, too,
using Safari (so it is not limited to iOS). You can visit 
http://www.google.com/about/company/ hit the word "Company" in the header a 
couple times to refresh. After that the "refresh" icon in Safari's address bar
will render a blank page.
Lokesh003