Cannot load balances  from external  token lists

1. Connect to a wallet
2. Pick BNB as a source chain, USDT token
3. Open Buy token list
4. Switch to Base there
5. Check FMS token’s balance → it shows a loading state.

<img width="483" height="531" alt="Image" src="https://github.com/user-attachments/assets/e799634a-d699-4a99-b9cb-513176d068a8" />

**Expected**: balances should be loaded