Description

This PR fixes this issue #9196.
Patch created considering this open PR on core MetaMask/core#4143

When a user imports an account with Nfts then switches back and forth betwen two accounts, at some point he will see nfts from one account appear on another.

Link to core branch for the patch : https://github.com/MetaMask/core/compare/patch/mobile-assets-controllers-v-12-0-0...patch/mobile-assets-controllers-v-12-0-0-nft-bug?expand=1

Related issues

Fixes: #9196.
Core PR: MetaMask/core#4143

Manual testing steps

1. Open app
2. Import an account that has nfts (use for example orangefox.eth)
3. Create a new account (You can either create a new account which will be empty or use any account that you already have)
4. Switch back and forth between orangefox.eth and another account fast and you will see nfts from orangefox.eth that appear on the other account. (This should not happen on this PR)

Screenshots/Recordings

Before

After

Switching back and forth between accounts

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.