Got exactly the same problem with one colony. Took the QE off two weeks ago and they've still not drawn the foundation even though they're making comb on top of the brood frames where there is plenty of Brood and masses of stores. About a coupe of dozen bees are in the super but they've made no impact on the foundation at all.
My other colony is onto its third super, two full and capped. Put the third super on a week ago. Plenty of work but not drawn the foundation yet but it's not been the best week in Cornwall.
Any other ideas welcome!