Using a Javascript reserved keyword (default) as property name in an interface

The following snippet is a part from a swagger.json file:

    "SomeDateRanges": {
        "type": "object",
        "properties": {
          "default": {
            "allOf": [
              {
                "$ref": "#/components/schemas/DateRange"
              }
            ]
          },
        },
        "additionalProperties": false
      },

The property 'default' is used in our c# code and is perfectly valid there.

However, in Javascript, the word default is a reserved keyword (source).

So swagger-codegen-cli (3.0.34.jar) adds a preceding underscore:

export interface SomeDateRanges {
  _default?: DateRange;
}

But the back-end is still returning a JSON containing the property 'default', and not '_default' causing it to not work in our application.

What we're doing now is manually changing the property to 'default'. But that is quite cumbersome having to do that each time.

What we could do is rename the property. But that would be a breaking change for our API. But in general, is this a desired situation that the property is renamed to something that does not exist?

Use the supplied SomeDateRanges schema and its default property as the reproduction case for swagger-codegen-cli 3.0.34. Trace how the generated TypeScript interface maps reserved property names, then verify that the client can access the JSON field named default without requiring a manual rename.