Round Robin Assignment Rule: Not Triggering Notification Email Workflows?

Round Robin Assignment Rule: Not Triggering Notification Email Workflows?

We've got a round robin assignment rule that assigns new leads to alternating sales staff. This works well, however, it never triggers any of my notifications.

The following notifications are triggering properly if the action is done manually, but are not triggered if the action is part of the round robin:
  • Lead Assignment Workflow: When a lead is created, the owner is notified
  • Lead Owner Update Workflow: When a lead's owner is changed, the new owner is notified
  • New Lead Task Workflow: When a new task is created that contains the words "New Lead", the task owner is notified (a task like this is automatically created as part of the round robin assignment rule)
Why would a round robin assignment rule fail to trigger the notification email workflows? Any way to fix this?

Thanks!

Alnis