Confused: Is Watch not allowed while in Reserve?

[apmcodes]

Is WATCH not allowed while in RESERVE call? Is this the way beanstalkd works or is it fivebeans?

In the below code, first reserve command is run and then watch command after 2 secs, but watch command callback is never run.

consumer.js

var fivebeans = require('fivebeans');

var client = new fivebeans.client('127.0.0.1', 11300);
client
    .on('connect', function () {
        console.log('Connected');
    })
    .on('error', function (err) {
        // connection failure
    })
    .on('close', function () {
        // underlying connection has closed
    })
    .connect();

client.reserve(function (err, jobid, payload) {
    if (err) { console.log(err) }
    console.log(`Job Id ${jobid}`);
    console.log(`Job data ${payload.toString()}`);
    client.destroy(jobid, function (err) {
        if (err) { console.log(err) }
        console.log(`Job deleted ${jobid}`);
    });
});

setTimeout(() => {
    console.log('going to watch')
    client.watch('low-volume', (err, tubecount) => {
        console.log(err);
        console.log(tubecount);
    })
}, 2000)    

Output

Connetced
going to watch

[apmcodes]

Seems as beanstalkd reserve is a blocking call, other commands such as watch/ ignore are hanging. Is there way to watch while the client is still in reserve?