At least you can get past the challenge. For me, every-single-time it is an endless loop of "select all bikes/cars/trains". I've given up even trying to solve the challenge anymore and just close the page when it shows up.
It is Cloudflare, I see it too. It's a Cloudflare page, with all branding, the spinning circle, then a captcha pops up on the same Cloudflare-branded page.
