This happened to me. Last year, I didn't have my honey house finished and the equipment wasn't all here, so I just left the supers on the hives through the Winter. In early March of this year I pulled the supers off and tried to extract the honey. It was about half crystallized, so I didn't get a lot of the honey out of the comb even though I went through the whole process of uncapping every frame. I even tried heating the honey house, but just couldn't get it to reliquefy. Later this year, around July, I pulled the supers off again and found that the crystallization was gone and the extraction went very well. The bees, and the temperature, had reliquefied the remaining honey and added more to finish out the cells. Hope this helps. West Texas Mark