Custom field search returns random results even when field is not searchable

[rahulrkr08]

Description

When searching customers using a custom field that is not searchable, the API returns unrelated results instead of an empty list.

Steps to Reproduce

• Create a custom field for the customer resource, e.g. cf_ref_id.
• Ensure this field is not searchable in the Chargebee configuration.
• Do not assign any values to this field for any customers.

Run the following code:

this.chargebee.customer
.list({ limit: 1 })
.param({ 'cf_ref_id': '123' })
.request((error, result) => {
console.log("result", result);
});

Actual Behavior

The API returns the first customer in the list (limited to 1), even though there is no customer with cf_ref_id = '123' and the field is not searchable.

Expected Behavior

The API should return an empty result since, the field is not searchable and no customer has a value for cf_ref_id.