When you make a movie, everyone should leave their own personal problems at home. When they start bringing those to set, filming can be very difficult... You don't need any extra drama. Put the drama into the story, in the characters.
When you make a drama, you spend all day beating a guy to death with a hammer, or what have you. Or, you have to take a bite out of somebody's face. On the other hand, with a comedy, you yell at Billy Crystal for an hour, and you go home.