You can bet 90% of the reason for Sorensen's demotion stems from a single play -- the one where Dawson Knox ended up way behind him for a long and easy TD catch and run. Sorensen apparently thought the play was over and stopped running until it was too late. Not a good look, but that's all it takes. Remember the "Nate Gerry missed a tackle" hysteria from Philly DWFs, or the time Chris Conte was trucked on national TV. The buffoonish Adam Rank on NFL Network's fantasy football show still often brings up Conte as the butt of jokes when he wants to rip on a player. Just wait for Andrew Wingard to take a poor angle or miss a tackle and he'll be right back to the bench too.
Sorensen had finally been getting some long overdue respect from the fake news sports media this season, but one bad play or one bad game and it's instantly forgotten.