Hello,
I need to get an email from summary of issue and put it in a text field in the same issue.
I use JQL:
issueFunction in issueFieldMatch('project = ATLAS AND issuetype = "Chore"', "summary", "[a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+@[a-zA-Z0-9.-]+")
that works correct, because it find one and only issue fitting the conditions. So it means that my regular expression is OK.

Then I've created a simple automation like on screenshot below

and it works every time, but nothing happens in issue fields. I mean I see success status in audit log, but when i check the issue link I see that there is no any new value in that field.
The example of smart value for text field i got from documentation here: https://support.atlassian.com/cloud-automation/docs/jira-smart-values-text-fields/
Any idea why smart value from action in my automation doesn't set the email to a text field? Maybe I have a smart value syntax error in action?