Strange Output Behavior using winrm invoke ExecuteShellCommand

I’m using the Powershell winrm invoke ExecuteShellCommand method, to test the output of a simple shell command:

echo "+ apigee-service apigee-cassandra status"

When running the Shell Command directly on the SSH Terminal, i’m getting the correct output:

$ echo "+ apigee-service apigee-cassandra status"
+ apigee-service apigee-cassandra status

But when running the command using the winrm invoke ExecuteShellCommand method, i’m only getting the + sign in the StdOut field:

C:\Users\testuser\Desktop\Testshellcommand.ps1
SCX_OperatingSystem_OUTPUT
    ReturnValue = TRUE
    ReturnCode = 0
    StdOut = +
    StdErr

This is my XML Configuration File:

<p:ExecuteShellCommand_INPUT xmlns:p="http://schemas.microsoft.com/wbem/wscim/1/cim-schema/2/SCX_OperatingSystem">
<p:Command>echo "+ apigee-service apigee-cassandra status"</p:Command>
<p:timeout>60</p:timeout>
</p:ExecuteShellCommand_INPUT>

What am i missing here?

I did noticed,
That by removing the spaces in the command written in XML Configuration File, i’m getting more results in the StdOut field:

C:\Users\testuser\Desktop\Testshellcommand.ps1
SCX_OperatingSystem_OUTPUT
    ReturnValue = TRUE
    ReturnCode = 0
    StdOut = +apigee-serviceapigee-cassandrastatus

    StdErr