Hi Seth thx for answers i have this captcha problem since 2 week
i try your Demo test site and its work for both
i dont know the cause maybe its about cloudflare or Jscript or https
i got this message
https://www.google.com/recaptcha/api/fallback?k=6LcVxQsTAAAAAA9PM3osPv40xmVMNF7G1YkAgOxM&hl=en&v=r20160531110558&t=20147à
and this html code on the page its always happen on Yobit.net Poloniex
battlebit.co and cryptonator too maybe its about their Cloudflare hosting site.
</noscript><div class="if-js-enabled">Please upgrade to a <a href="
https://support.google.com/recaptcha/?hl=en#6223828">supported browser</a> to get a reCAPTCHA challenge.</div><br>Alternatively if you think you are getting this page in error, please check your internet connection and reload.<br><br><a href="
https://support.google.com/recaptcha#6262736" target="_blank">Why is this happening to me?</a></div><div class="fbc-separator"></div><div class="fbc-privacy"><a href="
https://www.google.com/intl/en/policies/privacy/" target="_blank">Privacy</a> - <a href="
https://www.google.com/intl/en/policies/terms/" target="_blank">Terms</a></div></div><script>document.body.className += " js-enabled";</script></body></html>
its about javascript i think not sure about the code.. hehe