find_all_within_element with :xpath strategy return elements outside the parent element

[silentist]

Suppose there are 2 select element with name subtitles,
Hound.Helpers.Page.find_all_elements(:xpath, ~s|//select[@name="subtitles"]|)
|> Enum.at(1)
|> Hound.Helpers.Page.find_all_within_element(:xpath, ~s|//option|)
will return all options of the 2 select