We are trying to update a custom field using automation.
The custom field is a User Picker (single user) that is associated to the Edit Issue screen.
This custom field should populate with the issue assignee
I have tried every possible combination of variables to get this to work. The audit log says that it completed the action and edited the field, but I don't see any update on the issue.
Here is the rule:

Here is the audit log:

Here's the field on the issue after the rule was executed:

And, here is the custom field:
