If captcha checkbox fails, and the "please click on squares that show cats" game displays, then when proof of human is complete, the user must scroll back up to the captcha input box (iOS Safari).
It seems to be possible to overload the script on callback with something like in this SO post: https://stackoverflow.com/questions/41889296/google-recaptcha-scroll-to-bottom-of-page-when-verified-on-ios-devices/42673558#42673558
Note: it seems this is only an issue on iOS devices.
If captcha checkbox fails, and the "please click on squares that show cats" game displays, then when proof of human is complete, the user must scroll back up to the captcha input box (iOS Safari).
It seems to be possible to overload the script on callback with something like in this SO post: https://stackoverflow.com/questions/41889296/google-recaptcha-scroll-to-bottom-of-page-when-verified-on-ios-devices/42673558#42673558
Note: it seems this is only an issue on iOS devices.