Queue_log: ABANDON and agent name together

Colleagues, please tell me the answer to my question.

Sometimes I see lines in the queue_log file where the agent name is set for event ‘ABANDON’.
How can this be, and in what case?

For example: 1604061154|1604061149.2044510|q_common|Local/903@localext|ABANDON|2|3|5

I have always assumed that the ‘ABANDON’ event means that the caller hangs up without waiting for the agent to respond. What is this situation?

Thanks in advance for your reply,
Ogogon.

@PitzKey: That simply confirms that something strange is happening and justifies the original question!