By Andrew Holleran Patrick Mahomes had a sideline meltdown for the ages on Sunday afternoon. The Chiefs fell to the Bills, 20-17, at Arrowhead Stadium. Mahomes and the Chiefs had the ball late, with a chance to tie or go for the win, but they were unable to convert on a fourth down. Mahomes erupted on the sideline immediately following the failed fourth down attempt. At first, it was unclear who Mahomes was screaming at. Many assumed Mahomes was yelling at one of his teammates or coaches. However, we now know that wasn’t the case. Instead, Mahomes was yelling at a sideline official for a misse…