Is there an existing issue for this?

• I have searched the existing issues.

Is this a problem caused by your code, or is it specifically because of the library?

• I have double-checked my code carefully.

Describe the bug.

When calling client.deleteAddressbookContact() with a phone number in plain numeric format, the method throws a TypeError attempting to read the isLid property from an undefined object.

Expected Behavior

The method should successfully delete the contact from the addressbook, or at minimum provide a clear error message if the phone number format is invalid.

Steps to Reproduce the Bug or Issue

Environment

• whatsapp-web.js version: v1.34.3 (from GitHub: github:pedroslopez/whatsapp-web.js#v1.34.3)
• Node.js version: v22.16.0
• Operating System: Windows、Linux

1. Initialize a WhatsApp client using whatsapp-web.js
2. Call client.deleteAddressbookContact() with a plain numeric phone number (e.g., "1234567890")
3. The error occurs consistently every time

Code Example:
const client = new Client({
authStrategy: new RemoteAuth({
clientId: ${clientId},
// ... other config
})
});

await client.initialize();

// This throws an error
await client.deleteAddressbookContact("1234567890");

WhatsApp Account Type

Standard

Browser Type

Chromium

Operation System Type

Windows、Linux

Phone OS Type

IOS

WhatsApp-Web.js Version

1.34.3

WhatsApp Web Version

2.3000.1031077521

Node.js Version

v22.16.0

Authentication Strategy

RemoteAuth

Additional Context

According to the JSDoc comment in Client.js:2427, the expected phone number format is: "17182222222" (where "1" is a country code). However:

1. Multiple formats tested and all fail:
   - Plain numeric format: "1234567890" ❌ Fails
   - WhatsApp ID format: "[email protected]" ❌ Also fails with the same error