PM2 API ignores maxRestarts and restartDelay configuration

So, I have a worker which tries to grab some data from web. I want to restart it on every fail and log the error. To monitor the worker process I use pm2. The simplified sample looks like:

index.js

const pm2 = require('pm2');

pm2.connect(function(err) {
    if (err) {
          console.error(err);
          process.exit(2);
        }
    pm2.start({
          script    : 'populate.js',
          exec_mode : 'cluster',
          instances : 1,
          autorestart: true,
          max_memory_restart : '100M',
          max_restarts: 1000 // or maxRestarts: 1000 documentation is inconsistent here
    }, function(err) {
      if (err) return console.error('Error while launching applications', err.stack || err);
      console.log('PM2 and application has been succesfully started');
      pm2.launchBus(function(err, bus) {
        console.log('[PM2] Log streaming started');
        bus.on('log:out', function(packet) {
         console.log('[App:%s] %s', packet.process.name, packet.data);
        });
        bus.on('log:err', function(packet) {
          console.error('[App:%s][Err] %s', packet.process.name, packet.data);
        });
      });
    });
});

populate.js

const Promise = require('bluebird');

function populate() { // this function is just for illustration purpose
  return Promise.delay(500)
    .then(()=> Math.random() >= 0.5)
    .then(flag => {
      if(flag) {
        console.log('populates db')
        return populate()
      } else {
        throw new Error('something wrong')
      }
    })

}
populate()

But when I run script it doesn't restart scrapper more then 3 times(I expect 1000 times)

>    node index.js

PM2 and application has been succesfully started
[PM2] Log streaming started
[App:populate] populates db


[App:populate][Err]
You have triggered an unhandledRejection, you may
[App:populate][Err]
You have triggered an unhandledRejection, you may
[App:populate] populates db

[App:populate][Err]
You have triggered an unhandledRejection, you may
[App:populate][Err]
You have triggered an unhandledRejection, you may

Software versions used

OS         : os x 10.10.5
node.js    : v6.3.1
PM2        : pm2@2.4.0

Reproduce the behavior with the index.js and populate.js samples, starting at the pm2.start call and its max_restarts configuration. Compare the documented maxRestarts spelling and restartDelay handling, then verify that the worker honors both settings and restarts for the configured limit.