MAGETWO-99451: Custom customer address attribute values are empty when address is changed in admin checkout

Author: Oleksandr Iegorov

app/code/Magento/Sales/view/adminhtml/templates/order/create/form/address.phtml

@@ -6,6 +6,16 @@
 
 // @codingStandardsIgnoreFile
 
+/**
+ * @var \Magento\Customer\Model\ResourceModel\Address\Collection $addressCollection
+ */
+$addressCollection = $block->getData('customerAddressCollection');
+
+$addressArray = [];
+if ($block->getCustomerId()) {
+    $addressArray = $addressCollection->setCustomerFilter([$block->getCustomerId()])->toArray();
+}
+
 /**
  * @var \Magento\Sales\ViewModel\Customer\AddressFormatter $customerAddressFormatter
  */