ConfigMgr error: Ambiguous xpath used when adding an authentication feature

In ConfigMgr UI, Software/ESP process, ESP Service Binding, section: Feature Authentication, when add the second entry, type in something in description, and move to the next input, gives the error:

IPropertyTree: Ambiguous xpath used
getProp: ambiguous xpath "EspProcess[@name='myesp']/EspBinding[@defaultForPort='true'][@name='EspBinding'][@port='8043'][@protocol='http'][@resourcesBasedn='ou=EspServices,ou=ecl'][@service='WsTest'][@workunitsBasedn='ou=workunits,ou=ecl']/AuthenticateFeature[@authenticate='Yes']"