Why was Rob Kardashian not present during the extended Jenner-Kardashian vacation in Thailand recently? Well, according to recent reports, it was because he was checked into a ‘wellness center’, a.k.a. a rehab facility. Apparently, Rob’s recent weight gain has caused his lapse back into depression, and he feels like no matter what he does, the weight just won’t stay off. Also, sources reveal that Rob’s weight gain was mostly caused by sizzurp abuse, which Rob is starting to realize and wants to prevent from happening again.