Her ex worked on Time with Seohyun and refused to do any romantic scenes, treated all the female staff and actresses like trash and eventually quit halfway through
She told him not to do skinship or any other scenes with other women, which is absurd by itself, but he was the one on set going the extra mile to make everyone miserable. Saying "oh my girlfriend doesn't like it when I'm close to other women" is one thing, treating the staff like trash is another. Seohyun shook his hand and he immediately wiped it down with hand sanitizer right in front of her. He was the one making her cry everyday in her trailer. He's an adult in full control over his actions
I'm not calling him innocent, I'm just saying that he didn't get away it like you mentioned in your first post.