Query based on Pega 7.3.1

This is the Soap Response generated from my application, expected result. 

<?xml version="1.0"?>  <soap:Envelope  xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"  xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xmlns:xsd="http://www.w3.org/2001/XMLSchema"> 

What it ended up as was:  (response received by external party calling the API)

<?xml version="1.0"?><soap:Envelopexmlns:soap=http://schemas.xmlsoap.org/soap/envelope/xmlns:soapenc=http://schemas.xmlsoap.org/soap/encoding/xmlns:xsi=http://www.w3.org/2001/XMLSchema-instancexmlns:xsd=http://www.w3.org/2001/XMLSchema&gt;

1. What are the possible reasons why the soap response from Pega logs differs so much with the version received by external party? 

2. From Pega, the soap:response was in multiple lines meaning there is a line break (\n).  A parser of the response message perhaps strip away with "\n" resulting in a malformed XML with error.

How do I fix this issue?  

Thank you.