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" https://learn.microsoft.com/en-us/azure/data-factory/continuous-integration-delivery-improvements. 

Would appreciate some help with this!