SSM Automation Document aws:executeAwsApi - CreateTags does not run inside with SSM Maintenace window

Hello together,

I have a somewhat strange phenomenon with SSM Automation and Maintenance Windows. The Automation Document run under SSM -> Automation -> Execute Automation or direct from the Document it self perfectly.

But if the document is scheduled in the SSM "Maintenace Windows" and the targets are defined for example as a ResourceGroup. Than the function aws:executeAwsApi CreateTags fails with the message: "Step fails when it is Execute/Cancelling action. An error occurred (InvalidParameterValue) when calling the CreateTags operation: Value ( null ) for parameter resourceId is invalid. Null/empty value for resourceId is invalid. " I am guessing that there is a bug in the SSM Windows Maintenace function, and the parameter passing or mapping for aws:executeAwsApi is working incorrect.

So here the Code in YAML :

description: Start einer EC2 Instanz and set Tag.
schemaVersion: '0.3'
assumeRole: '{{ AutomationAssumeRole }}'
parameters:
  TagKey:
    type: String
    description: Set Tag Name
    default: SY-AutoPatch
  TagValue:
    type: String
    description: Value for the Tag
    default: '1'
  InstanceId:
    type: StringList
  AutomationAssumeRole:
    type: String
    description: 'Optional ARN Rolle '
    default: ""
mainSteps:
  - name: CreateTags
    action: 'aws:executeAwsApi'
    inputs:
      Service: EC2
      Api: CreateTags
      DryRun: false
      Resources:
        - '{{ InstanceId }}'
      Tags:
        - Key: '{{ TagKey }}'
          Value: '{{ TagValue }}'
  - name: startInstances
    action: 'aws:changeInstanceState'
    inputs:
      InstanceIds: '{{ InstanceId }}'
      DesiredState: running