I feel your pain. This is my second year with TTBH hives. The bees seem to work on all the frames at once and I get multiple frames with capped honey on the top half and uncapped on the bottom, but never a fully capped frame. Of course. I don't know how the drought is affecting all of this.
Last week I decided to take a mostly capped 3/4 frame of honey. 3 lbs of good honey, but I was really hoping to harvest several frames in June/July and let them work the fall for their winter feed. Oh well.
PS I have not feed them a drop of sugar since installing them last fall, so I feel good about them surviving on their own and confident when I take honey it is the real thing but realize it may be affecting my harvest quantity.