Error on user logon "Ignoring roster push with a non matching from"


I’m getting this error as soon as a new user connect on our local ejabberd server:

 **W/Roster: Ignoring roster push with a non matching 'from' ourJid='' from=''**

and I’m not able to see the new user.

If I close the app and then re-open the app, I can see the new user. I think this may be a issue due to resource matters.

BTW, this error is generated on the class RosterPushListener, triggered on roster push.

Thank in advance for any help.

See RFC 6121 - Extensible Messaging and Presence Protocol (XMPP): Instant Messaging and Presence § 2.1.6 2.