What is the biggest problem that self-managed work teams encounter

Friederick Herzberg constructed the Two-Factory Theory in 1959 which focuses on the theory of self-motivation and the implementation of self-directed work teams. Nowadays more and more organizations are reverting to self-managed work teams as there are many pros involved. Unfortunately, some of the cons experienced include: more meetings need to be held to make sure that everyone is on board, or projects take longer to finish because of the decision-making process lagging. The biggest problem would be that because there exists no structure within the team, chaos might erupt and productivity would decrease.