Mobile display problem

Hi
Thanks for WP Canvas Gallery. It’s good.
Working well on my site http://www.seaspellbeachhouse.co.uk

However the WP Canvas gallery images do not display on iOS – e.g. my iPad.

If I untick this option
“Use gallery CSS provided by plugin “

…I can fix the issue, but that’s not best.

can you help?

many thanks
Tim

https://wordpress.org/plugins/wc-gallery/