Yes we actually had this quite often (and were able to fix it every time), it is likely the cause of not correctly configuring the JID of the component or DNS issues.
Please PM/ email me your server name, host name / xmpp domain as well as your spectrum config file then we can have a look at this.
(icq example)
If setting the JID of the component to icq.your-domain ( Server -> Server Manager -> System Propeties -> xmpp.domain ) does NOT work, try setting it to icq.server-name / icq.hostname.
Edit:
Also please remember that you should STOP spectrum2 with spectrum2_manager stop (or stop the single component with spectrum2_manager $jid stop) BEFORE changing the jid. SPECTRUM 2 will not be able to stop the component after you change the jid in the config file. You will then have to do something like "ps auxw | grep spectrum" to find & kill the backends you left running, as spectrum 2 doesn't know how to adress these anymore.
Message was edited by: Axel-F. Brand