[GPL]

I was having this weird issue where the captcha page was closing instantly before being able to complete, causing JD to complain of skipping the check.

I eventually found out it was an extension I was using called Bookmark Sidebar.
https://chrome.google.com/webstore/d...dkfiicjkgofkdh

It embeds CSS in pages to render the sidebar.

I wasn't that attached to the extension. just got rid of it. thought I'd post here anyway, just in case anyone else has the same problem in future.