We have a customer with a PBX that has been running OK since summer but after the last update the Queue Manager has started to act up. We have "personal queues" for certain agents and when the QM starts to act up, the calls won't transfer even though the extension is free. After a restart of the QM service, it's back to working again. I'm not sure what to look for, can't see anything in the logs, it's just as if the QM "ignores" calls already in queues. This has happened about once a week.