Let's see if I might have the issue correct on this one. First of all, the status of the hive. Capped brood, larvae of all ages and eggs are present. I did not see the queen today, but I saw her on the 25th (5 days ago). Many, many, many drones and these:
Cells appear to be empty and dry as a bone. They are located on the upper deep.
Here are my thoughts: I think the bees have decided that the queen is almost at the end of here usefulness and they are about to replace her. Since there are eggs, the queen is still there and potentially there is a virgin queen running around or on a mating flight.
Okay, whose with me?