Start date won't automate (subtasks)

[Emma Hecht]

I'm working on automating start dates for subtasks and no matter what smart key or date I use (see examples below), when I create the issue, the subtask's start date remains blank.

Full automation layout:

Start date automation attempts:

Blank start date after I attempt to automate:

Has anyone else experienced this, and is there a fix? Ideally, I would like to automate the start date using the business days smart key. Thanks so much!

[Deleted user]

Could it be you have a validation-rule(workflow) in that project?  That there must be an assignee when creating a ticket? 

Or is it a new project?