xScheduledTask can't disable default ScheduledDefrag task

I'm using xComputerManagement 3.2.0.0, attempting to disable the default task ScheduledDefrag

I've tried populating all of the current values for the task, only changing Enable to $false and ScheduleType to 'Once'.

Here is the configuration and error thrown:

        {
            ActionArguments                 = '-c -h -k -g -$'
            ActionExecutable                = '%windir%\system32\defrag.exe'
            AllowStartIfOnBatteries         = $false
            Compatibility                   = 'Win8'
            Description                     = 'This task optimizes local storage drives.'
            DisallowDemandStart             = $false
            DisallowHardTerminate           = $false
            DisallowStartOnRemoteAppSession = $false
            DontStopIfGoingOnBatteries      = $false
            DontStopOnIdleEnd               = $false
            Enable                          = $false
            Ensure                          = 'Present'
            ExecutionTimeLimit              = '3.00:00:00'
            Hidden                          = $false
            IdleDuration                    = '00:00:00'
            IdleWaitTimeout                 = '00:00:00'
            LogonType                       = 'ServiceAccount'
            MultipleInstances               = 'IgnoreNew'
            Priority                        = '7'
            RandomDelay                     = '00:00:00'
            RepeatInterval                  = '00:00:00'
            RepetitionDuration              = 'Indefinitely'
            RestartCount                    = '0'
            RestartInterval                 = '00:00:00'
            RestartOnIdle                   = $false
            RunLevel                        = 'Highest'
            RunOnlyIfIdle                   = $false
            RunOnlyIfNetworkAvailable       = $false
            ScheduleType                    = 'Once'
            StartTime                       = '1/28/2018 12:00:00 AM'
            TaskName                        = 'ScheduledDefrag'
            TaskPath                        = '\Microsoft\Windows\Defrag\'
            User = 'SYSTEM'
            WakeToRun                       = $false
        }


VERBOSE: [ADM3]: LCM:  [ End    Test     ]  [[xScheduledTask]DisableScheduledDefragTask]  in 0.4430 seconds.
PowerShell DSC resource MSFT_xScheduledTask  failed to execute Test-TargetResource functionality with error message: Trigger type  not recognized.
Parameter name: CimClassName
    + CategoryInfo          : InvalidOperation: (:) [], CimException
    + FullyQualifiedErrorId : ProviderOperationExecutionFailure
    + PSComputerName        : localhost```

Start by reproducing the xScheduledTask configuration for the ScheduledDefrag task and trace MSFT_xScheduledTask Test-TargetResource where the "Trigger type not recognized" error is reported. Confirm how the existing ScheduledDefrag trigger is represented, then verify that setting Enable to $false with ScheduleType 'Once' completes successfully.