1. User1 logs in 2. User2 logs in (should have User1 in his roster) 3. User1 starts a phone conversation with someone 4. User2 should see User1 as on-the-phone 5. Remove the asterisk plugin 6. User2 should see User1 available (no longer on-the-phone) Step 6 is failing. The plugin needs to revert presences to previous state before having the phone call when it is being removed.