[lxml] issue with findtext and find

Hi, For the following scenario find and find text cannot return the element. Is it intended functionality or a possible bug? <a> <b> </b> <b> <c></c> </b> </a> when element called with elm.find("b/c") or elm.findtext("b/c"), it returns None. However, when I call find with exact XPATH location it returns the expected result. Best, Tim