The Cavs have won 12 consecutive games for the third time this season. But one element has left them unsatisfied with the history they're making.

Donovan Mitchell scored 41 points, including 12 in the fourth quarter, to help the Cleveland Cavaliers rally from 22 points down and stun the Boston Celtics 123-116 on Friday night in the final regular-season meeting of the Eastern Conference’s top two teams.

The Cavs keep winning, but slow starts are a growing concern. Can they fix this bad habit before the playoffs make it costly?