Wasn't super noticable until i attempted to run a smallish mekanism fission reactor in the mining dimension and began working with compact machines but, chunk loading across dimensions seems to intermittently break which kept causing my fission reactors to overload and melt down. making no other changes than downgrading to ftb-chunks-forge-1802.3.6-build.145 fixed the issue (not sure whether to open this here or with their team. No other changes to configs or mod versions have been made other than to increase the max number of chunks that are allowed to be forced loaded

issue with FTB chunks reverting to earlier version fixed this, thanks for the support...