From personal experience, and the help of others, this could be a sign of the onset of Metabolic Bone Disease. In such a young gecko, this suggests that poor amounts of calcium were absorbed and used by the gecko when growing. Further signs of this are seizing of the joints and toes, floppy movements, further bad sheds and refusal to feed.
However, if it begins feeding, hit it with the calcium....hard. If it becomes a good feeder, you can save it, as I did with a baby Barking who is now a yearling and going strong.
It may not be MBD, but then again, it could be. Good luck!