I have never seen anything like it. I have of course supplied the bees with plastic, wax coated foundation to draw out. In most the frames they have done exactly what was expected and drew out the foundation in the normal fashion. On a few others they started drawing new coomb from the top bar of the frame, across the existing foundation, suspending over it? There is space the bees can travel through between the plastic cell foundation, and the new comb they built, can't see if there are cells on the back side as would be expected, but would seem too close to the plastic cell foundation to have the cells on both sides of the freshly drawn comb. Anyone else seen this, and a possible explaination??? Not enough wax on the plastic cell?