Having trouble tagging a VM via SOAP Request in CloudForms 3.0

Issue

When I make a SOAP request (like below) through CloudForms 3.0 I am not able to tag a VM, why is that?

SOAP Requeset:

<typens:EVMProvisionRequestEx>
      <version>1.1</version>
      <templateFields>name=CFVM-Template-RHEL6|request_type=template</templateFields>
      <vmFields>number_of_sockets=x|cores_per_socket=x|vm_memory=...</vmFields>
      <requester>user_name=admin|owner_first_name=...</requester>
      <tags>customer=MSITS|environment=dev</tags>
      <additionalValues>gateway=x.x.x.x|placement_folder_name=xxx|...</additionalValues>
      <emsCustomAttributes/>
      <miqCustomAttributes/>
    </typens:EVMProvisionRequestEx>

In the Overview of the Request - I can see that the Tags are approved and signed to the Request.
But finally the VM does not have the requested Tags.