[Bug]:

Nobody has claimed this yet.

### Describe the bug

Title: ETH balance in extension UI not updating after confirmed on-chain transactions (Sepolia)

Description:

The balance displayed in the MetaMask extension UI does not reflect the actual on-chain balance for my account on Sepolia testnet, even after multiple confirmed transactions and manual cache-clearing attempts.

Steps to reproduce:

Connect wallet to a local dApp interacting with a smart contract on Sepolia.
Send a transaction (e.g. funding a contract with ETH).
Confirm the transaction is mined and successful (verified via console logs and Etherscan).
Check the ETH balance shown in the MetaMask extension UI.

Expected behavior:
MetaMask UI balance should reflect the new on-chain balance after a confirmed transaction.

Actual behavior:
MetaMask UI continues to display a stale balance that does not match the balance shown on Etherscan for the same address, even after:

Toggling "Show test networks" off/on
Clearing activity and nonce data (Settings → Advanced)
Confirming the correct network (Sepolia) is selected

Environment:

Network: Sepolia
Wallet address: 0x41dbdBBB116C5eFb9c0290b9A4A61502361b5bB9
Etherscan balance (ground truth): (insert current Etherscan balance here)
MetaMask displayed balance: (insert current MetaMask balance here)
Browser: (insert your browser + version)
MetaMask version: (Settings → About → version number)
Relevant tx hashes:
0x9b966cd6a79a1b9e165e464b6a8OO9ac7b2f933...
0x0ca66750bfe21410c7a1ca02847087f9e52ff998356adac1e9e2dd069b8846f0
0x16d87deed1e91bbbd266456714ebb1536c095003ce38c34860804f42ea261109

Additional notes:
On-chain transaction history and balance confirmed correct via Etherscan; discrepancy appears isolated to the extension's cached UI state.

contact email: icmelvin134@gmail.com

### Expected behavior

_No response_

### Screenshots/Recordings

_No response_

### Steps to reproduce

On Sepolia testnet, connect a MetaMask account to a local dApp that interacts with a deployed smart contract.
Trigger a transaction from the dApp (e.g. sending ETH to fund a contract, or withdrawing ETH from it) and confirm it in MetaMask.
Wait for the transaction to be mined (verified via console logs showing a receipt/confirmation, and independently via Etherscan).
Check the account's ETH balance in the MetaMask extension UI.
Compare that balance against the same address on Sepolia Etherscan (https://sepolia.etherscan.io/address/).
Attempt to force a refresh: toggle "Show test networks" off/on, use "Clear activity and nonce data" (Settings → Advanced), confirm Sepolia is the actively selected network, and restart the browser entirely (not just the extension popup).
Recheck the MetaMask balance after each step above.

Result: Balance in MetaMask still does not match Etherscan's value even after all refresh attempts.

### Error messages or log output

```shell

```

### Where was this bug found?

Live version (from official store)

### Version

MetaMask Version 13.40.0

### Build type

None

### Browser

Chrome

### Operating system

Linux

### Hardware wallet

_No response_

### Additional context

_No response_

### Severity

_No response_

Start by tracing the extension UI balance refresh path for a confirmed Sepolia transaction, using the reproduction steps and the transaction hashes against Etherscan. The report does not name a source file or test and leaves the observed balances, browser version, and one transaction hash incomplete; done should mean the displayed balance matches the confirmed on-chain balance after the listed refresh attempts.

Written by the indexing model from the issue text.