Broadcasting transaction failed with code 4 (codespace: sdk). Log: signature verification failed; please verify account number (37), sequence (4) and chain-id (lava-testnet-2): unauthorized

we are encountering this on every transaction on lava network
we recently upgrade to cosmos 47 but i can confirm this also happened on 46

snippet of the code causing this issue:
```typescript
let wallet = await Secp256k1Wallet.fromKey(fromHex(privKey), "lava@")
const [firstAccount] = await wallet.getAccounts();
console.log(firstAccount)
let signingClient = await getSigningLavanetClient({
rpcEndpoint: publicRpc,
signer: wallet,
})

const msg = lavanet.lava.subscription.MessageComposer.withTypeUrl.buy({
creator: firstAccount.address,
consumer: firstAccount.address,
index: "explorer",
duration: new Long(1), /* in months */
})

const fee = {
amount: [{ amount: "1", denom: "ulava" }], // Replace with the desired fee amount and token denomination
gas: "50000000", // Replace with the desired gas limit
}

await signingClient.signAndBroadcast(firstAccount.address,[msg], fee, "Buying subscription on Lava blockchain!")
```
Results:
```log
BroadcastTxError: Broadcasting transaction failed with code 4 (codespace: sdk). Log: signature verification failed; please verify account number (37), sequence (4) and chain-id (lava-staging-4): unauthorized
at SigningStargateClient.broadcastTx (/home/user/telescope-test/lavajs/node_modules/@cosmjs/stargate/src/stargateclient.ts:449:9)
at processTicksAndRejections (node:internal/process/task_queues:95:5)
at async run (/home/user/telescope-test/lavajs/test.ts:45:3) {
code: 4,
codespace: 'sdk',
log: 'signature verification failed; please verify account number (37), sequence (4) and chain-id (lava-staging-4): unauthorized'
}```

Important to note I've also tried other message construction options which used to work for cosmos v45.11 and stopped working for the lava stargate client on the latest release.