It may take Cole a little longer to find his rhythm in the offense. PG has more facets than other positions. He has found a nice groove defensively. The offense should catch up over time.
A snap shot of Cole right now shows 9.7 points, 4.0 assists, 2.2 turnovers and a steal plus, per game. Those are decent numbers. His shooting has been poor as he is 32% from the field overall and 34% from three. He's 81% from the foul line but his misses were catastrophic. But just watching him play, I believe there is upside to his offensive game.
Defining this as a "problem" is probably an overstatement.