CHICAGO — Velus Jones Jr. fell to the ground at the 9-yard line Thursday night at Soldier Field, and the football hit him in the face mask and bounced to the field. The Chicago Bears rookie returner tried to jump on the fumble, but the Washington Commanders recovered it at the Bears 6-yard line. Two plays later, Commanders running back Brian Robinson Jr. scored on a 1-yard run, and following a failed two-point conversion, the Commanders had a 12-7 lead midway through the fourth quarter. A mistake like Jones’ muffed catch in a game in which the Bears failed to score from within 5 yards of the e…