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I have an XML file like this:

"<?xml version ='1.0' encoding='UFT-8'?>"+
"<CLOSE_TRAILER>"+
 "<user>" +
 "<id>0600580</id>" +
 "<trans_id>7</trans_id>" +
 "<host_name>Mnull</host_name>"+
 "<session_token>79430831Zahyy</session_token>" +
 "<time_stamp>1551736026682</time_stamp>" +
 "</user>"+
 "<trailer_detail>" +
 "<org_id>432</org_id>" +
 "<trailer_prefix>XTRA</trailer_prefix>" +
 "<system_type>SCAN</system_type>" +
 "<truck_mail_flag>false</truck_mail_flag>" +
 "<trailer_type_code>T</trailer_type_code>" +
 "<in_contingency_flag>false</in_contingency_flag>" +
 "<detl_code_svc_type>OVN</detl_code_svc_type>" +
 "<catg_code_svc_type></catg_code_svc_type>" + 
 "<seal_number>12345</seal_number>" +
 "<user_id>5155035</user_id>" +
 "<trailer_number>24813</trailer_number>" + 
 "</trailer_detail>"+
 "<load_handler>" +
 "<employee_id>TEST</employee_id>" +
 "<trailer_load_seq>71373839</trailer_load_seq>" +
 "<action_code></action_code>" +
 "</load_handler>"+
"</CLOSE_TRAILER>";

I want to map the trailer_detail and load_handler but not user, it into this object that I created for this xml:

@JsonRootName(value = "CLOSE_TRAILER")
public class CloseTrailerXml 
 @JsonUnwrapped
 Trailer trailer_detail;
 @JsonUnwrapped
 LoadHandler load_handler;

The Trailer class I have mapped like this:
@JsonRootName("trailer_detail")

public class Trailer {

 private Integer equipmentSeq;
 private String createdBy;
 private ZonedDateTime createdDt;
 private String updatedBy;
 private ZonedDateTime updatedDt;
 @JsonProperty("trailer_number")
 private String trlrNbr;

... more member variables

In a unit test case I have the above xml stored as a string and I use this code below to map it into the object:

String msgNoNewLineChar = originalScannerMsg.replace("\n","");
 String msgNoCarReturnChar = msgNoNewLineChar.replace("\r", "");

 XmlMapper xmlMapper = new XmlMapper();
 xmlMapper.setSerializationInclusion(Include.NON_NULL);
 CloseTrailerXml closeTrailerXml= xmlMapper.readValue(originalScannerMsg, CloseTrailerXml.class);

The closeTrailerXml is created but all values are null.
If I remove the encoding line and CLOSE_TRAILER tag and the user section, it maps fine.

Why can't the object mapper work with the user section present?