I saw a lot of wasp flying around an area that I have passion vine in and went to see if I could see a nest. As it turned out they weren't at the PV, they were hovering around a Acer Maple there and would briefly touch leaves and up again. There were like twenty or more and the tree is very small and thin so I know it wasn't for nest site selection. I think they were getting a sticky substance off of the leaves maybe?
