Merge remote-tracking branch 'origin/MC-21568' into 2.3-develop-pr36

Author: serhii-balko

app/code/Magento/Persistent/Model/QuoteManager.php

@@ -89,7 +89,6 @@ public function setGuest($checkQuote = false)
                 ->setCustomerLastname(null)
                 ->setCustomerGroupId(\Magento\Customer\Api\Data\GroupInterface::NOT_LOGGED_IN_ID)
                 ->setIsPersistent(false)
-                ->setCustomerIsGuest(true)
                 ->removeAllAddresses();
             //Create guest addresses
             $quote->getShippingAddress();