Arbitrum Seploia wrong ETH balance displayed

[francestu96]

As the title suggests, I got some inconstancy on the balance of a wallet of mine and the ConnectionButton on Arbitrum Seploia testnet.
It shows my balance is always 0 despite of being what it actually is.

This is the simplest code to test it:

import { createAppKit } from '@reown/appkit/react'
import { WagmiProvider } from 'wagmi'
import { arbitrum, arbitrumSepolia, AppKitNetwork } from '@reown/appkit/networks'
import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
import { WagmiAdapter } from '@reown/appkit-adapter-wagmi'

const queryClient = new QueryClient()
const projectId = process.env.NEXT_PUBLIC_REOWN_PROJECT_ID || "";

const networks: [AppKitNetwork, ...AppKitNetwork[]] = [arbitrumSepolia, arbitrum]

const wagmiAdapter = new WagmiAdapter({
    networks,
    projectId,
    ssr: true
})

createAppKit({
    adapters: [wagmiAdapter],
    networks,
    projectId,
    themeVariables: {
        "--w3m-accent": "#DA3F5E",
    },
    features: {
        connectMethodsOrder: ['wallet'],
    }
    // metadata
})

const App = () => {
    return (
        <WagmiProvider config={wagmiAdapter.wagmiConfig}>
            <QueryClientProvider client={queryClient}>
                <appkit-button />
            </QueryClientProvider>
        </WagmiProvider>
    );
};

export default App;