Hey Millz, I don't have logs right now for this but will work on trying to get some for you the next raid, but it appears the CR keeps making the decision of burning soulfire instead of demon bolt at < 20% of boss HP. I think this has something to do with molten core stacks, like the priority seems to be to burn molten core stacks BEFORE going into demo if the number is higher then you set. The problem is that in execution range the # of stacks never goes down. I have resorted to manually removing the molten core buff in order to get it to go into meta and cast demon bolt. I never noticed this up until maybe 4-5 days ago but seems to be happening more and more.
Like I said, will try to get you a log after tomorrow nights raid.