Escalation to multiple groups does not work anymore.

See attachment for action-details:

• both step1 operations are identical
• both groups of the step1 operations contain multiple users
• both groups contain a user with configured sms address and jabber adress
• the action audit shows that a certain user of "Support team...." got a jabber message and a sms message
• the action audit shows that a certain user of "Unix administrators" got a jabber message but not a sms message
• notifications in other actions to the "Unix administrators" group works properly with that users
• if i add the sms address to the "Support team...." group...the notification works properly

It seems that there is something wrong in the action-escalation logic...

Please let me know, how i can debug this/provide debug information....