Given that the final battle in Avengers: Endgame features thousands of characters battling for the fate of the universe, it shouldn’t come as a surprise that a tiny mistake slipped through. Eagle-eyed fan @ironman.tw (via ComicBook) pointed out on Instagram that there’s one shot where Doctor Strange is inexplicably wearing the Eye of Agamotto even though it was destroyed by Thanos at the end of the Titan fight in Infinity War.
The blink-and-you-miss-it moment where you can catch a glimpse of the necklace comes just before Captain America gives his signature “Avengers assemble!” rallying cry.
Source: IGN.com Doctor Strange Error Spotted in Avengers: Endgame