I have an ACD with 6 Agents. From time to time the system stops responding when a caller makes a selection as to where the call should be routed.
I suspect it is a timing issue in the disconnect part of the call - the vgAgent client will have the "hangup" option in focus. If the agent does not click on the "hangup", then the 2 bridged lines do not disconnect causing all further calls to fail (when the inbound caller makes a selection to be routed.)
I have lots of logs for the time period when the system was in this error condition.
I have them on dropbox, please indicate to who I should share. I will send an email to support regarding this.