Google & Sitemaps.org Mirror Copies - A Duplicate Content Issue?

It looks like Google.com and Sitemaps.org host the same exact copies of the Sitemaps.org information. Is this a classic no-no when it comes to duplicate content? Jamie Alberico posted about this on Twitter and yea, it seems to be the case.

from Search Engine Roundtable https://ift.tt/3n6JMFd