Duplicate records in eventhub message

[buchagj]

We are seeing 2 duplicate records per event hub message. Is this by design or is there an issue? This is our first time using this function app. Any assistance would be appreciated.

sample message in eventhub:
{ body: '{"records":[{"time":"2021-09-10T20:02:30.0094229Z","category":"NetworkSecurityGroupFlowEvent","operationName":"NetworkSecurityGroupFlowEvents","resourceId":"/SUBSCRIPTIONS/F9EA7F5D-324F-4C97-8B60-6734F9DC6F76/RESOURCEGROUPS/SIC-DEMO-DEV/PROVIDERS/MICROSOFT.NETWORK/NETWORKSECURITYGROUPS/SICDEMO-NSG","version":2.0,"nsgRuleName":"DefaultRule_AllowVnetInBound","mac":"000D3A3CECED","startTime":"1631304101","sourceAddress":"172.16.0.9","destinationAddress":"172.16.0.11","sourcePort":"61914","destinationPort":"80","transportProtocol":"T","deviceDirection":"I","deviceAction":"A","flowState":"B"},{"time":"2021-09-10T20:02:30.0094229Z","category":"NetworkSecurityGroupFlowEvent","operationName":"NetworkSecurityGroupFlowEvents","resourceId":"/SUBSCRIPTIONS/F9EA7F5D-324F-4C97-8B60-6734F9DC6F76/RESOURCEGROUPS/SIC-DEMO-DEV/PROVIDERS/MICROSOFT.NETWORK/NETWORKSECURITYGROUPS/SICDEMO-NSG","version":2.0,"nsgRuleName":"DefaultRule_AllowVnetInBound","mac":"000D3A3CECED","startTime":"1631304101","sourceAddress":"172.16.0.9","destinationAddress":"172.16.0.11","sourcePort":"61914","destinationPort":"80","transportProtocol":"T","deviceDirection":"I","deviceAction":"A","flowState":"B"}]}', properties: None, offset: 355480, sequence_number: 275, enqueued_time=datetime.datetime(2021, 9, 13, 16, 37, 12, 592000, tzinfo=datetime.timezone.utc) }