App:Close URI and 99xx, 89xx phone models

Version 1
    This document was generated from CDN thread

    Created by: Sergei Gorbunov on 04-02-2013 02:15:12 AM
    Hi! We have expirenced a problem with App:Close URI on 99xx, 89xx phone models. We send following XML to phone via JTAPI:
    <?xml version="1.0" encoding="UTF-8"?>
    <CiscoIPPhoneExecute>
    <ExecuteItem URL="App:Close:1:10:Some/AppName" Priority="0"/>
    </CiscoIPPhoneExecute>
    and receive following answer:
    <?xml version="1.0" encoding="utf-8"?>
    <CiscoIPPhoneResponse>
    <ResponseItem URL="App:Close:1:10:Some/AppName" Data="Success" Status="0" />
    </CiscoIPPhoneResponse>

    But application is not closed. We have downloaded a phone logs and see that there is many NullPointerException here. We think there is a firmware bug. Can you confirm that? Or may be this is known issue/behaviuor? See phone logs in attach.