Essentially it died because I'm impatient.
I had cut my 1 JT cutting into 3 2-node segments and put them into soil cups with humidity domes under cfl lamps. Of those 3 segments one went soft and died flat out, one has shown no growth but also no dying signs, and the third one had some leaves. For whatever reason I thought it would be a good idea to tug on the one with leaves to see how strong it's roots were (stupid). That was last night. This morning I checked on it and all the leaves had gone limp and withered.