I don't have any experience with that specific device, but if you only had this issue with this one coil while all the others in those 6 boxes worked flawlessly, I would be inclined to think you got a dud coil.
This happens because liquid is getting into the center of your coil. You can try to absorb some up this liquid by inserting something down into the chimney - like pipe cleaner or rolling up the corner of a small piece of toilet paper.