Activity Stream in the Agent Workspace will not evaluate the ACL properly (Cannot retrieve "current.field_name" Causing it to be Null)DescriptionActivity Stream in the Agent Workspace will not evaluate the ACL properly (Cannot retrieve "current.field_name" Causing it to be Null)Steps to Reproduce 1) Create a choice field named "data_protection" on the Attachment table and have 2 choices on it (OP1 and OP2 Respectively) 2) Attach an Attachment to incident Table and navigate to it on the "sys_attachment" List and add the value of the field "data_protection" as OP1 for that attachment. 3) Now Deactivate all the READ ACLs on the "sys_attachment" Table in the instance. 4) Create a new Read ACL on the sys_attachment table with the below script (Make sure "Admin Overrides" is Unchecked): answer = new global.Cus_AttachmentSecurity().canRead(current); 5) Create a new Script Include "Cus_AttachmentSecurity" with the below script : var Cus_AttachmentSecurity = Class.create();Cus_AttachmentSecurity.prototype = {canRead: function(current) {if(current.data_protection == 'OP1'){return false;}else if (current.data_protection == 'OP2'){return false;}var tableName = current.table_name + '';var parentRecord = new GlideRecord(tableName);return parentRecord.canRead();},type: 'Cus_AttachmentSecurity'}; 6) Now Access the Incident record on the platform UI 16 and observe that the Attachment is not visible rightly as per the ACL and the login in the Script Include. 7) However, Look at the same record in the Agent Workspace, The attachments dont show them but the Activity stream still shows them which is not correct. Expected behavior: The Agent Workspace Activity stream should hide the Attachments as applied on all the other parts of the platform. Actual behavior: The Agent Workspace Activity stream does not hide the Attachments as applied on all the other parts of the platform.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 article to be notified when more information becomes available.Related Problem: PRB1615853