The information came straight from someone either playing with the band or extremly close to them (I know who but I simply don't to want to put the finger on it since it leaked rather accidently). Bobby missed the 2015 mini tour due to him going through a divorce at that point. Now it's a common thing in music business that musicians need to train a lot before a touring cycle (remember Richie was in Hawaii getting in shape for the Circle tour when he got called back into the studio to re-record the Born To Follow solo) in order to minimize the risk of shows being cancelled because of health issues. Lenny Kravitz actually has some really hard bootcamps for his touring musicians before they hit the road. We all know how much Bobby turned into Santa Clause during 2014/15 and Jon allegedly told him to "get his act together" for the upcoming THINFS album/promo/touring cycle to which Bobby didn't react too well. He basically told Jon to **** off and take care of his own shit. That's where that ended.