I have the same issue with the image layout of products when using Safari browser on the i pad. I am using layout of 12 products per page, on a chrome or IE on I pad, or on laptop and Pc it shows 4 rows of 3 products per row. When using Safari on the I pad it has a very random display, and it is never the same each time you refresh or reload. Sometimes it will be one image on 1st row, then 3 on 2nd row, and 1 on 3rd row, and one on 4th row, if you refresh the page they may then show correctly, or they may be another totally different random layout.
http://www.lovefascinators.co.uk/1.PNG
http://www.lovefascinators.co.uk/2.PNG
http://www.lovefascinators.co.uk/3.PNG
http://www.lovefascinators.co.uk/4.PNG
1 and 2 showing issues 3 and 4 same page that has been refreshed.
There have been no customisations to CSS
8theme version 1.71 (Think wee have chosen the Food theme option)
Header 12, Left sidebar
Wordpress Version 4.11
Thanks very much Rowan