Bees will not come out of a hive if it is placed over a campfire

I have spawn bee hives and waited until the bees have gone in, placed a campfire under it and silk touched it to an item. Then, when pacing it again, there are no bees.  Also, I lured newly hatched bees to an old hive and locked them in the room.  They went into the new to them hive and never came out.