Interesting thing I discovered today and have never seen before. See if you can spot it.
Second, are the bees unable to cure the honey for some reason? This is a possibility based on a few factors. First, high humidity would make it difficult to cure honey. Second, poor ventilation might cause the same problem. All the hives I noticed this problem in today were ones that have a single 1.5" circular entrance. The problem was more pronounced in 5-frame nucs, but also seen in single deep hives as well. It was not seen in hives with more than one entrance or those with a wide bottom entrance. In fact, in the picture above with the bearding bees, those are the hives where these frames were found. They were not bearding this morning however.
I don't have a solid answer, but I think the second scenario is more likely, that poor ventilation is causing problems curing the honey, exacerbated by high humidity here in Arkansas.