Many are guessing that Go Hyun Jung had friction with the PD because of her character's severe lack of screen time, despite being the main character. However, an insider revealed that Go Hyun Jung had known this would be the case because she had received the drama script up to episode 8.
The insider told OSEN, "She read the script all the way up to episode 8, and decided to confirm her casting. She knew the amount of screen time she would get in the beginning. So her lack of screen time is not the reason for their friction. There were numerous times when she would be late, or when she would suddenly leave the set while filming. Filming couldn't continue as the actress was missing, and the other actors also had to wait. Because of these actions, the script had to be changed on the spot sometimes."
Another insider added, "The recap given at the beginning of the episodes is put in there because Go Hyun Jung didn't finish filming, so the staff lacked footage. They didn't have a choice but to put that in to fill in the time."