closeTunnel has high latency

[blogwy]

After I run closeTunnel, the tunnel website can still be accessed. Then it took 2 minutes for the tunnel to be completely closed

const SSH2Promise = require('ssh2-promise')

const sshconfig = {
host: 'xxxxx',
username: 'xxxx',
password: 'xxxx',
port: 'xxxx'
}

const tunnelConfig = {
name: 'hahaha',
remoteAddr: 'localhost',
remotePort: '80'
}

var ssh = new SSH2Promise(sshconfig);

ssh.addTunnel(tunnelConfig).then((tunnel) => {
console.log(tunnel.localPort);
});

ssh.closeTunnel('hahaha')
.then(res => {
console.log('24')
console.log(res)
})
.catch(err => {
console.log('28')
console.log(err)
})