However, an insider claims everything is OK between the couple - who share one-month-old Dream together - now.
They added to E! News: "Whatever people might think about the situation, the emotion during the weekend was 100 percent authentic. This argument got a lot of attention, but honestly, this was kind of like a normal tiff for them. They always have these up and downs.
"Everything is fine between them now. Rob has promised to get some help for self-esteem and jealousy issues. They are both committed to making this work. Ultimately, they both love one another. As for whether they will last, who knows? But they're both going to try."
Rob's sisters were said to be very "worried" about the 29-year-old sock designer after they saw his posts on social media about Chyna walking out.
When they "rushed over" to be with him, he was "fine" but the Kardashians are fed up of Chyna's behaviour and have banned her from attending the family's annual Christmas Eve party.