StartTime not working when recomposing

[bleyers]

When running the following code i get an error. The recompose happens but the starttime is not set and task runs immediately

      #recompose
        $ce_delay = 10
        $Start_time = (Get-Date).AddMinutes($ce_delay)
        Start-HVPool -Pool $ce_pool_id -Recompose -StartTime $Start_time  -LogoffSetting WAIT_FOR_LOGOFF -StopOnFirstError $false -ParentVM $ce_base_vm -SnapshotVM $($ce_snapshot.name)

ErrorRecord                 : The property 'startTime' cannot be found on this object. Verify that the property exists and can be set.
WasThrownFromThrowStatement : False
Message                     : The property 'startTime' cannot be found on this object. Verify that the property exists and can be set.
Data                        : {System.Management.Automation.Interpreter.InterpretedFrameInfo}
InnerException              : 
TargetSite                  : Void CheckActionPreference(System.Management.Automation.Language.FunctionContext, System.Exception)
StackTrace                  :    at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
                                 at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame frame)
                                 at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
                                 at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
                                 at System.Management.Automation.Interpreter.Interpreter.Run(InterpretedFrame frame)
                                 at System.Management.Automation.Interpreter.LightLambda.RunVoid1[T0](T0 arg0)
                                 at System.Management.Automation.PSScriptCmdlet.RunClause(Action`1 clause, Object dollarUnderbar, Object inputToProcess)
                                 at System.Management.Automation.PSScriptCmdlet.DoEndProcessing()
                                 at System.Management.Automation.CommandProcessorBase.Complete()
HelpLink                    : 
Source                      : System.Management.Automation
HResult                     : -2146233087

Versions....

Manifest   1.3.1           VMware.Hv.Helper                 {Add-HVDesktop, Add-HVRDSServer, Clear-HVEventDatabase, Connect-HVEvent...}                         
Script     7.0.0.15939650  VMware.Vim                                                                                                                           
Script     12.0.0.15939657 VMware.VimAutomation.Cis.Core    {Connect-CisServer, Disconnect-CisServer, Get-CisService}                                           
Script     12.0.0.15939652 VMware.VimAutomation.Common      {Get-Task, New-OAuthSecurityContext, Stop-Task, Wait-Task}                                          
Script     12.0.0.15939655 VMware.VimAutomation.Core        {Add-PassthroughDevice, Add-VirtualSwitchPhysicalNetworkAdapter, Add-VMHost, Add-VMHostNtpServer...}
Script     7.12.0.15718406 VMware.VimAutomation.HorizonView {Connect-HVServer, Disconnect-HVServer}