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);
    return m_map_keys.size() > 0 || m_map_crypted_keys.size() > 0;
}
int64_t DescriptorScriptPubKeyMan::GetOldestKeyPoolTime() const
{
    
    
    return 0;
}
size_t DescriptorScriptPubKeyMan::KeypoolCountExternalKeys() const
{
    if (m_internal) {
        return 0;
    }
    return GetKeyPoolSize();
}
unsigned int DescriptorScriptPubKeyMan::GetKeyPoolSize() const
{
    LOCK(cs_desc_man);
    return m_wallet_descriptor.range_end - m_wallet_descriptor.next_index;
}
int64_t DescriptorScriptPubKeyMan::GetTimeFirstKey() const