Catalog Item Attachments are all showing up on SCTASK after Vancouver Upgrade

[Zubair Alam]

Please guide on why all attachments attached to a catalog items are showing under SCTASK related list "attachment" tab, when a user is only submitting just one of those attachments. 
This issue surfaced after Vancouver upgrade. 
Please guide if I can create a Business Rule to allow only the user submitted attachment to show on the SCATSK rather than all the attachments attached to catalog item. 
Any help is appreciated. Thanks. 

[Zubair Alam]

Hi Jaspal,

                 Looked as you suggested, This relationship script applies to the "task" table and queries from sys_attachment. 

(function refineQuery(current, parent) {

    try{

       var itemList = getItemList();

       //Get attachments for all of the above

       current.addQuery('table_sys_idIN' + itemList);

}

catch(e){

       gs.log("Error(" + e.lineNumber + "): " + e, "CONSOLIDATED ATTACHMENTS");

}

function getItemList(){

       var arrItems=[],references=[],relTasks=[],relEmails=[];

       relTasks=[parent.sys_id];

   //Get References

       references = getReferences(parent);

   //Get Emails

       var instanceList = relTasks.concat(references);      

       relEmails = getRelatedEmails(instanceList.join());

       arrItems = instanceList.concat(relEmails);

       return arrItems.join(); //Return as a CSV list

}

function getReferences(parent){

   //Get referenced record_ids

       var refFields = parent.getFields();

       var itemListRefs = [];

       for (var i=0; i<refFields.size(); i++) {

               var field = refFields.get(i);

               var ed = field.getED();

               if(field.getED().getInternalType() == 'reference' && field.hasValue()){

                               itemListRefs.push(field.toString());

               }

       }

       return itemListRefs;

}

function getRelatedEmails(instanceList){

       var strItems = '';

       var grRelEmail = new GlideRecord('sys_email');

       grRelEmail.addQuery('instanceIN' + instanceList);

       grRelEmail.query();

       while(grRelEmail.next()){

               strItems += grRelEmail.sys_id + ',';

       }      

       return strItems.split(',');

}

})(current, parent);