JobScheduler REST web services - XML Command should not return bad request

Current Situation

• Following the steps from chapter "Example for retrieval of status information" of the JobScheduler REST Web Service article results in an http error code 400 for /joc/api/jobscheduler/commands
• Sample Request

  POST /joc/api/jobscheduler/commands HTTP/1.1
  Host: localhost:4446
  Content-Type: application/xml
  access_token: 7be8f9e8-8783-4f00-9fb2-1ce3c5843932
  Cache-Control: no-cache
  <jobscheduler_commands jobschedulerId="scheduler111"><show_task id="21105"  /></jobscheduler_commands>
  

• Consider the linked SourceForge post.

Desired Behavior

• Requesting JobScheduler commands should work as documented.