Merge branch 'MC-18918' of https://github.com/magento-tango/magento2ce into PR-16-08-2019

Author: Spandana Chittimala

app/code/Magento/Checkout/Model/Session.php

@@ -370,6 +370,11 @@ public function loadCustomerQuote()
                 $this->quoteRepository->save(
                     $customerQuote->merge($this->getQuote())->collectTotals()
                 );
+                $newQuote = $this->quoteRepository->get($customerQuote->getId());
+                $this->quoteRepository->save(
+                    $newQuote->collectTotals()
+                );
+                $customerQuote = $newQuote;
             }
 
             $this->setQuoteId($customerQuote->getId());