At Mentions (@ mentions) not showing the userIssue In Journal fields (Work Notes and Additional Comments), we can mention the user to pass the communication. At Mentions can show all users and it follows the 'Name' field of the user to populate.CauseThe most probable cause if a user is not visible on @mentions is due to the Name field of the user starts with space character. At Mentions cannot read the users if the first character is space.ResolutionMake sure the Name field of the user doesn't start with space.Remove the space character at the start of the name field for the user to fix the issue.