azure-cli: Failing to break lease for PREMIUM_LRS storage or detach os disk

I have several virtual machines which uses a bunch of blobs. these blobs are divided into two storages (PREMIUM_LRS and STANDARD_LRS). If i try to restore a blob, i shutdown the virutel machines which is using the blob and then break the lease (instead of deleting the VM). this works fine for STANDARD_LRS stored blobs. For PREMIUM_LRS Blobs i allways get the Message: “This blob is being used by the system.” - but i did stop and deallocated the using virtuel machine?!

DEBUG LOG:

File logging enabled - Writing logs to '/root/.azure/logs'.
Command arguments ['storage', 'blob', 'lease', 'break', '-b', 'test02-db01-02.vhd', '-c', 'vhds', '--connection-string', 'DefaultEndpointsProtocol=https;EndpointSuffix=core.cloudapi.de;AccountName=[REPLACED];AccountKey=[REPLACED]']
Current cloud config:
{'endpoints': {'active_directory': 'https://login.microsoftonline.de',
               'active_directory_data_lake_resource_id': None,
               'active_directory_graph_resource_id': 'https://graph.cloudapi.de/',
               'active_directory_resource_id': 'https://management.core.cloudapi.de/',
               'batch_resource_id': 'https://batch.cloudapi.de/',
               'gallery': 'https://gallery.cloudapi.de/',
               'management': 'https://management.core.cloudapi.de/',
               'resource_manager': 'https://management.microsoftazure.de',
               'sql_management': 'https://management.core.cloudapi.de:8443/',
               'vm_image_alias_doc': 'https://raw.githubusercontent.com/Azure/azure-rest-api-specs/master/arm-compute/quickstart-templates/aliases.json'},
 'is_active': True,
 'name': 'AzureGermanCloud',
 'profile': 'latest',
 'suffixes': {'azure_datalake_analytics_catalog_and_job_endpoint': None,
              'azure_datalake_store_file_system_endpoint': None,
              'keyvault_dns': '.vault.microsoftazure.de',
              'sql_server_hostname': '.database.cloudapi.de',
              'storage_endpoint': 'core.cloudapi.de'}}
Registered application event handler 'CommandTableParams.Loaded' at <function add_id_parameters at 0x7f41b36039d8>
Registered application event handler 'CommandTable.Loaded' at <function add_id_parameters at 0x7f41b36039d8>
Successfully loaded command table from module 'storage'.
Extensions directory: '/root/.azure/cliextensions'
Application event 'CommandTable.Loaded' with event data {'command_table': {'storage blob lease break': <azure.cli.core.commands.CliCommand object at 0x7f41b35c5ef0>}}
Application event 'CommandParser.Loaded' with event data {'parser': AzCliCommandParser(prog='az', usage=None, description=None, formatter_class=<class 'argparse.HelpFormatter'>, conflict_handler='error', add_help=True)}
Application event 'CommandTableParams.Loaded' with event data {'command_table': {'storage blob lease break': <azure.cli.core.commands.CliCommand object at 0x7f41b35c5ef0>}}
Application event 'CommandParser.Parsing' with event data {'argv': ['storage', 'blob', 'lease', 'break', '-b', 'test02-db01-02.vhd', '-c', 'vhds', '--connection-string', 'DefaultEndpointsProtocol=https;EndpointSuffix=core.cloudapi.de;AccountName=[REPLACED];AccountKey=[REPLACED]']}
Application event 'CommandParser.Parsed' with event data {'command': 'storage blob lease break', 'args': Namespace(_command_package='storage', _jmespath_query=None, _log_verbosity_debug=False, _log_verbosity_verbose=False, _output_format='json', _parser=AzCliCommandParser(prog='az storage blob lease break', usage=None, description='Breaks the lease, if the blob has an active lease. Once a lease is broken, it cannot be renewed. Any authorized request can break the lease; the request is not required to specify a matching lease ID. When a lease is  [...]
Getting data service client service_type=BlockBlobService
azure.multiapi.storage.v2017_04_17.common._auth : String_to_sign=PUT


x-ms-client-request-id:fd4b8d8e-da4f-11e7-a7b7-a434d9460bfd
x-ms-date:Wed, 06 Dec 2017 06:37:55 GMT
x-ms-lease-action:break
x-ms-version:2017-04-17
/test02fast/vhds/test02-db01-02.vhd
comp:lease
azure.multiapi.storage.v2017_04_17.common.storageclient : Client-Request-ID=fdb89488-da4f-11e7-a7b7-a434d9460bfd Outgoing request: Method=PUT, Path=/vhds/test02-db01-02.vhd, Query={'comp': 'lease', 'timeout': None}, Headers={'x-ms-lease-id': None, 'x-ms-lease-action': 'break', 'x-ms-lease-duration': None, 'x-ms-lease-break-period': None, 'x-ms-proposed-lease-id': None, 'If-Modified-Since': None, 'If-Unmodified-Since': None, 'If-Match': None, 'If-None-Match': None, 'x-ms-version': '2017-04-17', 'User-Agent': 'Azure-Storage/0.37.0-0.36.0 (Python CPython 3.6.1; Linux 4.4.0-43-Microsoft) AZURECLI/2.0.20', 'x-ms-client-request-id': 'fd4b8d8e-da4f-11e7-a7b7-a434d9460bfd', 'x-ms-date': 'Wed, 06 Dec 2017 06:37:55 GMT', 'Authorization': 'SharedKey [REPLACED]'}.
urllib3.connectionpool : Starting new HTTPS connection (1): test02fast.blob.core.cloudapi.de
urllib3.connectionpool : https://test02fast.blob.core.cloudapi.de:443 "PUT /vhds/test02-db01-02.vhd?comp=lease HTTP/1.1" 409 219
azure.multiapi.storage.v2017_04_17.common.storageclient : Client-Request-ID=fdb89488-da4f-11e7-a7b7-a434d9460bfd Receiving Response: Server-Timestamp=Wed, 06 Dec 2017 06:37:55 GMT, Server-Request-ID=1f00da01-001c-0014-045c-6eb6ae000000, HTTP Status Code=409, Message=This blob is being used by the system., Headers={'x-ms-lease-id': None, 'x-ms-lease-action': 'break', 'x-ms-lease-duration': None, 'x-ms-lease-break-period': None, 'x-ms-proposed-lease-id': None, 'If-Modified-Since': None, 'If-Unmodified-Since': None, 'If-Match': None, 'If-None-Match': None, 'x-ms-version': '2017-04-17', 'User-Agent': 'Azure-Storage/0.37.0-0.36.0 (Python CPython 3.6.1; Linux 4.4.0-43-Microsoft) AZURECLI/2.0.20', 'x-ms-client-request-id': 'fd4b8d8e-da4f-11e7-a7b7-a434d9460bfd', 'x-ms-date': 'Wed, 06 Dec 2017 06:37:55 GMT', 'Authorization': 'SharedKey test02fast:[REPLACED]'}.
azure.multiapi.storage.v2017_04_17.common.storageclient : Client-Request-ID=fdb89488-da4f-11e7-a7b7-a434d9460bfd Operation failed: checking if the operation should be retried. Current retry count=0, Server-Timestamp=Wed, 06 Dec 2017 06:37:55 GMT, Server-Request-ID=1f00da01-001c-0014-045c-6eb6ae000000, HTTP status code=409, Exception=This blob is being used by the system.<?xml version="1.0" encoding="utf-8"?><Error><Code>SystemInUse</Code><Message>This blob is being used by the system.RequestId:1f00da01-001c-0014-045c-6eb6ae000000Time:2017-12-06T06:37:56.3333175Z</Message></Error>.
azure.multiapi.storage.v2017_04_17.common.storageclient : Client-Request-ID=fdb89488-da4f-11e7-a7b7-a434d9460bfd Retry policy did not allow for a retry: Server-Timestamp=Wed, 06 Dec 2017 06:37:55 GMT, Server-Request-ID=1f00da01-001c-0014-045c-6eb6ae000000, HTTP status code=409, Exception=This blob is being used by the system.<?xml version="1.0" encoding="utf-8"?><Error><Code>SystemInUse</Code><Message>This blob is being used by the system.RequestId:1f00da01-001c-0014-045c-6eb6ae000000Time:2017-12-06T06:37:56.3333175Z</Message></Error>.

This blob is being used by the system.

Environment summary

Install Method (e.g. pip, interactive script, apt-get, Docker, MSI, edge build) / CLI version (az --version) / OS version / Shell Type (e.g. bash, cmd.exe, Bash on Windows)