Enum member generated with empty name

[gradisarjoze]

We have a graphql-mesh instance deployed and is working correctly.
In projects we have set up graphql-codegen which generates Typescript file based on schema exposed by graphql-mesh instance.

We have an issue where Typescript enum member is generated with an empty name.

index.mjs built by mesh:

(function (TaxExempt4) {
    TaxExempt4["_"] = "";
    TaxExempt4["EXEMPT"] = "exempt";
    TaxExempt4["NONE"] = "none";
    TaxExempt4["REVERSE"] = "reverse";
})(TaxExempt4 || (TaxExempt4 = {}));

Schema:

...
{
  "kind": "ENUM",
  "name": "TaxExempt4",
  "description": null,
  "fields": null,
  "inputFields": null,
  "interfaces": null,
  "enumValues": [
    {
      "name": "EXEMPT",
      "description": null,
      "isDeprecated": false,
      "deprecationReason": null
    },
    {
      "name": "NONE",
      "description": null,
      "isDeprecated": false,
      "deprecationReason": null
    },
    {
      "name": "REVERSE",
      "description": null,
      "isDeprecated": false,
      "deprecationReason": null
    },
    {
      "name": "_",
      "description": null,
      "isDeprecated": false,
      "deprecationReason": null
    }
  ],
  "possibleTypes": null
},
....

Result of codegen:

export enum TaxExempt4 {
  Exempt = 'EXEMPT',
  None = 'NONE',
  Reverse = 'REVERSE',
   = '_'
}

I'm checking docs of both graphql-mesh and graphql-codegen to find how I could fix this issue directly with configuration and I'm not really coming up with a whole lot.
Is there any way to handle such enums? Is there any way to prepend enum member names?