Boston Celtics All-Star small forward Jayson Tatum watched his team stumble again on the night he was honored with an All-Star nod for the second time. To make matters worse, it came after Celtic helped boost a strong comeback effort late in Tuesday’s game against the Dallas Mavericks.

There is speculation that perhaps the team’s two-star wingers, Tatum and first-time All-Star forward Jaylen Brown, have lost faith in their team-mates as everyone from two-way point guard Tremont Waters to early point guard Kemba Walker had problems with their play over the years. this …