When you clone a task, the new one is properlly located at the beginning of the workflow assigned to the project, however the asignee remains the one in the original task. If you have defined a Default Asignee in the project properties; the task should be assigned to him and is not.

This makes the clone function completelly unusable for us; as the project lead will not be able to move the issue forward in the workflow as is not the asignee