I could not reproduce on the Apple iPad Simulator, or my iPhone5 put into desktop mode (this was tested on your own site). It may be a bug in an older version of iOS, however if it was it'd be an issue with CKEditor so chances are we would just have to knock it upstream to those guys.
Automated response: Question overlay prompts not working on iOS
Mobile Safari doesn't auto-focus the input field, and a bug means that focusing it ends up being treated as a command to close the overlay. Thus, the overlay closes before you can type.
I could not reproduce on the Apple iPad Simulator, or my iPhone5 put into desktop mode (this was tested on your own site). It may be a bug in an older version of iOS, however if it was it'd be an issue with CKEditor so chances are we would just have to knock it upstream to those guys.
Strange, it does the same on my iPad 3(iOS 6.1.3) and iphone 5 (iOS 6.1.3)
Not a biggy as you can just type img tags in.
Cheers
Ade
Mobile Safari doesn't auto-focus the input field, and a bug means that focusing it ends up being treated as a command to close the overlay. Thus, the overlay closes before you can type.