Occasionally, you could accidentally noindex a couple of choice pages you’ve referenced in your hreflang tags. When this comes about, search engines like google and yahoo received’t Stick to the tag around the web site and gained’t follow the return link to the website page that references the choice variations.  https://socialmphl.com/story20749243/rumored-buzz-on-tag-hreflang-automatici-e-tag-canonici-seo