Suitelet Sublist no longer populated

We have a Suitelet that has various sublists of it. We populated the lines in the Sublists in the Suitelet. This used to work fine, but no longer works. Am I doing something that is not supported?

Here is a simplified version of what I am doing:

function updateCustomer(request, response)  {  if (request.getMethod() == 'GET' ) {     var form = nlapiCreateForm('Update Contractor');   form.addTab('custpage_address_tab', 'Address');      var companynamefield = form.addField('companyname','text', 'Contractor Name');   companynamefield.setDefaultValue('Bobs Maintenance');      // Create Address Sublist   var addresssmachine = form.addSubList('custpage_address_list','inlineeditor','Address','custpage_address_tab');   var labelfield = addresssmachine.addField('label','text', 'Label');   var addr1field = addresssmachine.addField('addr1','text', 'Address Line 1');   var addr2field = addresssmachine.addField('addr2','text', 'Address Line 2');     // Populate Sublist   nlapiInsertLineItem('custpage_address_list', 1);   nlapiSetLineItemValue('custpage_address_list', 'label', 1, 'Office');       nlapiSetLineItemValue('custpage_address_list', 'addr1', 1, '23 Main Str');       nlapiSetLineItemValue('custpage_address_list', 'addr2', 1, 'Ferndale');         form.addSubmitButton('Submit');   form.addResetButton('Reset');   response.writePage(form);    }  }