I have an up to date WordPress site, running WooCommerce and Yoast that has the following noindex set in the headers on every single page.
x-robots-tag: noindex, nofollow, nosnippet, noarchive
I'm not sure where it's coming from. The only references are in wp-admin/admin-ajax, some woocommerce plugin files, some Yoast files and a wp-includes file; nothing out of the ordinary I think.
Cloudflare is enabled which I have read can cause this issue somehow, but pausing it doesn't seem to effect anything. Yoast is configured normally and as per dozens of other sites.
I am having some difficulty understand what is causing / controlling this - and even what, when and how someone would use x-robots-tag.
This question pertains to programming and setup of the x-robots-tag and not optimisation or general SEO friendliness, I know already that I do not want this tag appearing.