I couldn't understand what's the reason for the SocketClosedUnexpectedlyError error fired in the code below:

const redisClient = require('redis').createClient();

redisClient.connect().then(function() {
  return redisClient.disconnect();
})
.then(function() {
  redisClient.connect();
});

If I wrap the second redisClient.connect() call inside a setTimeout() call, as shown below, the error seems to go away:

const redisClient = require('redis').createClient();

redisClient.connect().then(function() {
  return redisClient.disconnect();
})
.then(function() {
  setTimeout(function() {
    redisClient.connect();
  }, 0);
});

Can anyone please explain what's the reason for the error thrown above? The documentation of @node-redis isn't good enough to explain this.