@mention sows sys_id in front of the user's name.Description@mention can show a sys_id in front of the user's name when sys_user.name value has an @ sign in itSteps to Reproduce 1. Go to an Incident and write @(user name) in the 'Additional comments' field2. Change the status of the incident to 'On hold'3. Set the status of the 'On hold reason' field to 'Awaiting caller'4. Go back to the 'Additional comments' field and you will see that the 'sys_id' has been set in front of the username.WorkaroundThis problem is currently under review. You can contact ServiceNow Technical Support or subscribe to this Known Error article by clicking the Subscribe button at the top right of this form to be notified when more information will become available.Related Problem: PRB1458155