The "Gone Girl" actor and Garner both 43 are discovering that living with an ex can be rather challenging, reported People magazine.
"It's obvious many times that they both find it annoying to deal with each other. Understandably so. It's a strange situation to live together and yet be separated," a source said.
The couple are putting their differences aside to keep their three children, Violet 10, Seraphina, 7, and Samuel, 3 happy.