XPath nested selectors doesn't always work

[kamituel]

For a UI map like this:

(def ui {:el1 {:self (by-xpath "//*....")
                   :child (by-xpath "//h1")
            {:el2 {:self (by-xpath "//*....")
                   :child (by-xpath "//h1")}

(note that :child is same in both submaps), when doing: ($ :el2 :child), the :el1 :child is returned.
When :child selector is CSS, not XPath, it seems to be working well.