Summary

Why one of the users is not getting Slack messages when an issue is transitioned from one status to another via automation

Environment

Jira Cloud

Diagnose

Custom field name: Testers

Custom field ID: 10039

The 'testers' custom field, is of type User Picker (multiple users) which is used as a plain value.

If more users are added to this specific field, it will be converted to a string with a comma as a separator. 

That means `@` will be added to the first user in the list.  (the user email address gets `@` appended to it, which makes the email address invalid.)

Cause

It was found that '@' symbol was used in the message screen for Send Slack message.

Solution

• We modified the automation rule and made changes in the message screen for Send Slack message by removing the '@' symbol from the given syntax for Tester.
  
• Upon executing the rule, it worked as expected and the slack notifications were received successfully.