How to send bounceable transfer of native TON?

According to the documentation:

• https://docs.ton.org/develop/smart-contracts/tutorials/wallet
• https://docs.ton.org/develop/smart-contracts/messages
• https://docs.ton.org/develop/smart-contracts/guidelines/non-bouncable-messages

To send bounceable transfer it is required to set bounce flag in internal message and use sending mode +16.

+16 | In the case of action fail - bounce transaction

It is uninitialized wallet: https://testnet.tonviewer.com/EQAfs3mJctSyXlJpR89j6h1T7fYJ_nBt8hGbfkDUaET7x9p8

Code sample:

import { WalletContractV4, TonClient, internal } from '@ton/ton';

const client = new TonClient({
  endpoint: 'https://testnet.toncenter.com/api/v2/jsonRPC',
});

const walletContract = client.open(wallet);
const seqno = await walletContract.getSeqno();

const transfer = await walletContract.createTransfer({
  secretKey: key.secretKey,
  seqno: seqno,
  sendMode: 16,
  messages: [
    internal({
      to: 'EQAfs3mJctSyXlJpR89j6h1T7fYJ_nBt8hGbfkDUaET7x9p8',
      value: 12345,
      bounce: true,
      // sender is fresh wallet so init it
      init: wallet.init,
    })
  ],
});

await walletContract.send(transfer);

Expected behaviour

Transaction amount is returned to sender minus fee

Actual bahaviour

An infinite number of attempts has spent the sender's entire balance https://testnet.tonviewer.com/0QA3tr_6AZK9qMQy46a7ULtriizI7iXeiPufNxib4a7b6eU8