When running walletpassphrase on a large wallet.dat (ie about 300,000 segwit P2SH addresses) the command sometimes takes a very long time, and if command is run multiple times at once (while running slow) it causes bitcoin core to freeze (stops syncing and requires kill -9 to stop/restart)

During the locked up walletpassphrase commands being run the following messages start to appear in the debug.log:

`018-01-24 01:01:04 socket sending timeout: 1201s`

Note that this problem is intermittent, so sometimes the command runs instantly, other times it takes a few minutes, and other times it completely freezes the node.
{
    LOCK(cs_desc_man);
    m_map_keys[key_id] = key;
    return true;
}
bool DescriptorScriptPubKeyMan::AddCryptedKey(const CKeyID& key_id, const CPubKey& pubkey, const std::vector<unsigned char>& crypted_key)
{
    LOCK(cs_desc_man);
    if (!m_map_keys.empty()) {
        return false;
    }
    m_map_crypted_keys[key_id] = make_pair(pubkey, crypted_key);
    return true;
}
bool DescriptorScriptPubKeyMan::HasWalletDescriptor(const WalletDescriptor& desc) const