Oracle 2.0 property authenticationType is not specified

I just published upgrade to Oracle 2.0 connector (linked service) and all my pipelines ran OK in dev. This morning I woke up to lots of red pipelines that ran during the night. I get the following error message:

ErrorCode=OracleConnectionOpenError,'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message=
Failed to open the Oracle database connection.,Source=Microsoft.DataTransfer.Connectors.OracleV2Core,''Type=System.ArgumentException,
Message=The required property is not specified.
Parameter name: authenticationType,Source=Microsoft.Azure.Data.Governance.Plugins.Core,'

Here is the code for my Oracle linked service:

{
    "name": "Oracle",
    "properties": {
        "parameters": {
            "host": {
                "type": "string"
            },
            "port": {
                "type": "string",
                "defaultValue": "1521"
            },
            "service_name": {
                "type": "string"
            },
            "username": {
                "type": "string"
            },
            "password_secret_name": {
                "type": "string"
            }
        },
        "annotations": [],
        "type": "Oracle",
        "version": "2.0",
        "typeProperties": {
            "server": "@{linkedService().host}:@{linkedService().port}/@{linkedService().service_name}",
            "authenticationType": "Basic",
            "username": "@{linkedService().username}",
            "password": {
                "type": "AzureKeyVaultSecret",
                "store": {
                    "referenceName": "Keyvault",
                    "type": "LinkedServiceReference"
                },
                "secretName": {
                    "value": "@linkedService().password_secret_name",
                    "type": "Expression"
                }
            },
            "supportV1DataTypes": true
        },
        "connectVia": {
            "referenceName": "leap-prod-onprem-ir-001",
            "type": "IntegrationRuntimeReference"
        }
    }
}

As you can see "authenticationType" is defined but my guess is that the publish and deployment step somehow drops that property. We are using "modern" deployment in Azure devops pipelines using Node.js. 

Would appreciate some help with this!