Wasps on vanilla plant

Paper wasps seem to have found something important on the newly forming buds of this vanilla plant (an orchid). They certainly aren't interested in the flower, which is too bad, because vanilla flowers seldom ever get pollinated anywhere in the world. I could be wrong, but I suspect that the wasps are removing some of the soft tissue material of the buds, which in turn is used to build their nests. The individual in flight is returning to work after dive bombing me for getting too close.