Back to his old ways!

Rob Kardashian and Blac Chyna's upcoming reality show is already in jeopardy, because the reclusive reality star has been refusing to film with his pregnant fiancee, TMZ reports.

Kimmy K's little bro believes Keeping Up with the Kardashians destroyed his family, and he is worried that filming will do the same to his relationship with the video vixen.

The daddy-to-be has been a no-show for several important scenes, including the K clan's grandmother MJ's birthday in San Diego last week.

This is nothing new for ol' Robby, though! In recent years, he's largely hidden out in his bedroom while he battled depression and weight gain, so let's hope he's doing ok.

Producers are reportedly concerned that Rob & Chyna will go the way of I Am Cait... and be a massive flop!