[Bug]: Fork balance displayed briefly and then replaced by non-fork network balance

[benjisclowder]

Describe the bug

When using a fork for the Ethereum main network and funding the account with an amount of native tokens, the balance appears briefly, and then is replaced by the balance on the non-forked Ethereum network, thus not being able to perform transactions with the balance from the forked network. RPC doesn't change, it's still on the fork and it doesn't switch to Infura RPC to explain the balance changed.

Expected behavior

Balance is showcased correctly for the fork, instead of being replaced by non-forked network balance.

Screenshots/Recordings

Screen.Recording.2025-03-07.at.16.22.51.mov

Steps to reproduce

1. Load MetaMask & Tenderly
2. Create a fork for Ethereum Mainnet and fund the account with any amount
3. Go back to MetaMask and check balance
4. Notice forked network balance appears briefly, and then it is replaced by the initial balance on the Infura RPC, without RPC changing.

Error messages or log output

Detection stage

During release testing

Version

12.14.0

Build type

Beta

Browser

Chrome

Operating system

MacOS

Hardware wallet

No response

Additional context

No response

Severity

No response

[seaona]

hi there 👋 I think this is expected because the real balance is coming from the API request to https://accounts.api.cx.metamask.io/v2/accounts and not from the RPC (in this case, Tenderly).
If you want to see the Tenderly balance you could block the requests to the API, or use the Basic Functionality

[benjisclowder]

Closing as per the above statement.