Bitcoin Core v0.21.1

`bitcoin-cli walletprocesspsbt` does not trigger a `wallet locked please enter passphrase` warning when using a wallet which holds private keys. To be clear I am experiencing this behavior when using the `default` wallet created by core.

The expected behavior would be to remind the user they are dealing with an encrypted wallet, since `walletprocesspsbt` attempts to access private keys to sign the psbt. It would be useful if a warning were present in the rpc response to remind the user they are dealing with an encrypted wallet. 
if (!m_wallet_model) {
        return 0;
    }
    size_t n_signed;
    bool complete;
    TransactionError err = m_wallet_model->wallet().fillPSBT(SIGHASH_ALL, false , false , &n_signed, m_transaction_data, complete);
    if (err != TransactionError::OK) {
        return 0;
    }
    return n_signed;
}
void PSBTOperationsDialog::showTransactionStatus(const PartiallySignedTransaction &psbtx) {
    PSBTAnalysis analysis = AnalyzePSBT(psbtx);
    size_t n_could_sign = couldSignInputs(psbtx);
    switch (analysis.next) {
        case PSBTRole::UPDATER: {
            showStatus(tr("Transaction is missing some information about inputs."), StatusLevel::WARN);