"Kris doesn't want Rob on the show when he is emotionally unstable," a source tells PEOPLE

By Patrick Gomez
Updated March 26, 2015 09:15 AM
Credit: Alexander Tamargo/Getty

The Kardashian family is known for being open about their personal drama – but there are limits.

Even though Rob Kardashian‘s emotional outbursts have long been a plot point on her family’s E! reality series, momager Kris Jenner has chosen not to feature her only son on the new season of Keeping Up with the Kardashians.

“Kris doesn’t want Rob on the show when he is emotionally unstable,” a production source on KUWTK tells PEOPLE.

Rob made headlines on Sunday after posting an Instagram photo that compared Kim to fictional psychopath Amy Dunne from Gone Girl, and he has increasingly shied away from the spotlight in recent years as his weight gain has compounded (and been compounded by) his mental state.

“He has retreated more. He’s sad, he’s bitter, he’s single. He is very depressed and has been [for a while,]” a second source says of Rob, who canceled his plans to attend his sister Kim’s wedding last May due to criticism about his weight.

“The attitude has always been that when Rob gets his act together, starts working out and loses weight, everything will be good and he will be happy,” says the production source, who adds that the family has attempted multiple interventions. “But behind the weight gain is this very unhealthy mental state that he keeps struggling with.”

Reporting by AILI NAHAS

For more on Rob Kardashian’s struggles pick up the latest issue of PEOPLE, on newsstands Friday