currentRec.selectNewLine({sublistId: 'item'});
currentRec.setCurrentSublistText({sublistId: 'item', fieldId: 'item', forceSyncSourcing: true, text: itemOption.fieldDescription + ':' + itemOption.additionalDescription});
currentRec.setCurrentSublistValue({sublistId: 'item', fieldId: 'price', value: -1, forceSyncSourcing: true});
currentRec.setCurrentSublistValue({sublistId: 'item', fieldId: 'rate', forceSyncSourcing: true, value: 1});
currentRec.commitLine({sublistId: 'item'});

I am triggering this in the sublist changed event because I want to add another item based on the item options. This is not working as expected when I am using setSublistText. It works fine when using setSublistValue. Any advice?