I am using the "elegant" and "Smart Pocket (Mobile)" themes along with the "Mobile Theme for Tablets" and the "Crypto Captcha" plugin. When I view the designated pages using the Crypto Captcha plugin on desktop computers and Android devices, everything is good. But, when I view the designated pages using Crypto Captcha on an Apple iPhone or iPad, the captcha show only a question mark. Can anyone tell me why this might be happening and maybe how to fix it?

Any help would be appreciated. Thank you.

Kim