'Giant arc' stretching 3.3 billion light-years across the cosmos shouldn't exist

In the space.com report I found this refreshing to read, something I consider plain language, thus transparent to the public :)

“A newly discovered crescent of galaxies spanning 3.3 billion light-years is among the largest known structures in the universe and challenges some of astronomers' most basic assumptions about the cosmos. The epic arrangement, called the Giant Arc, consists of galaxies, galactic clusters, and lots of gas and dust. It is located 9.2 billion light-years away and stretches across roughly a 15th of the observable universe…"There have been a number of large-scale structures discovered over the years," Clowes told Live Science. "They're so large, you wonder if they're compatible with the cosmological principle." The fact that such colossal entities have clumped together in particular corners of the cosmos indicates that perhaps material isn’t distributed evenly around the universe. But the current standard model of the universe is founded on the cosmological principle, Lopez added. "If we're finding it not to be true, maybe we need to start looking at a different set of theories or rules." Lopez doesn't know what those theories would look like, though she mentioned the idea of modifying how gravity works on the largest scales, a possibility that has been popular with a small but loud contingent of scientists in recent years.”

Using the cosmology calculators, https://ned.ipac.caltech.edu/help/cosmology_calc.html, https://www.kempner.net/cosmic.php you can calculate the redshift and size of the universe when these objects formed in BB model. z~1.4 or 1.5 so the Giant Arc is moving away faster than c velocity now :)