[otrs] OwnerUpdate fired by whom?

Hi there, Here is an strange behavior that we don't understand, hopefully we will with your help: 1. An agent creates a ticket using the AgentTicketPhone interface and assigns it to a given queue (which he does not have in "my queues") at 15:34:35 2. Notifications are sent to the ones watching the given queue at 15:34:35 3. An OwnerUpdate event occurs at 15:34:35 and the new owner is the agent who created the ticket. No Agent fired this event o_0 Attached is a screenshot of the history of this ticket. We'd love to clarify who or what fired the OwnerUpdate event. Thanks, Leonardo Certuche