在使用k8s API杀死作业后，为什么作业仍在运行？

To simplify, I have a job with code (using GoLang) as:

DO_SOMETHING_A

propagation := metav1.DeletePropagationForeground
deleteOptions := &metav1.DeleteOptions{
        PropagationPolicy: &propagation,
}
BatchV1().Jobs(namespace).Delete(name, deleteOptions)

DO_SOMETHING_B

And I didn't add a GracePeriodSeconds value for the deleteOptions. However, I still can see the DO_SOMETHING_B has been executed after the job kills itself by using the BatchV1().Jobs(namespace).Delete(name, deleteOptions) API call.

What's the reason behind this?