I am seeing the same issue. HTML in the first tab title is replaced by character entities that print the code vs the intended HTML. Any suggestions for a fix?
In the meantime, we have changed the product detail URLs to get around whatever cached redirects must have been in place and added Redirection plugin redirects from the old URLs to the new URLs. Would still like to know how to get rid of those Yoast SEO redirects so that we could potentially go back to the previous URLs.