Sending y/n response not working after second time

[rodware10]

Hello I have the following code to reboot a device

connection.on('connect', async function () {
await connection.send('', async function (err, res) {
if (err) return err

    console.log('resp after cmd 1:', res.trim())
    await connection.send('reboot', async function (err, res) {
      if (err) return err

      if (res.indexOf('Save config to flash ') > -1) {
        console.log('resp after cmd 2:', res)
        await connection.send('n', async function (err, res) {
          if (err) return err

          console.log('resp uptime cmd 3:', res)
          await connection.send('y', async function (err, res) {
            if (err) return err

            console.log('resp uptime cmd 4:', res)
          })
        })
      } else {
        await connection.send('y', async function (err, res) {
          if (err) return err

          console.log('resp uptime cmd 4:', res)
        })
      }
    })
  })
});

and these are the outputs I'm getting

10055#
resp after cmd 2: reboot
Save config to flash ROM y/n

resp uptime cmd 3: n
Confirm reboot unit y/n
10055#
resp uptime cmd 4: y
?Unrecognised input
10055#

For some reason after the Confirm reboot unit y/n the process stops and after sending the "y" as response to confirm reboot it is taken as a new command so it returns Unrecognised input.

Thanks for you help