PM2 watch issue

pm2.log

Running tests:

#####################
# Watch for changes #
#####################

>server-watch.js

$pm2 kill
[PM2] Spawning PM2 daemon
[PM2] Success
[PM2] Stopping PM2...
[PM2] [WARN] No process found
[PM2] All processes has been stopped and deleted
[PM2] PM2 stopped

cp server-watch.bak.js server-watch.js

$pm2 start server-watch.js --watch
[PM2] Spawning PM2 daemon
[PM2] Success
[PM2] Process server-watch.js launched
┌──────────────┬────┬──────┬──────┬────────┬───────────┬────────┬─────────────┬──────────┐
│ App name     │ id │ mode │ PID  │ status │ restarted │ uptime │      memory │ watching │
├──────────────┼────┼──────┼──────┼────────┼───────────┼────────┼─────────────┼──────────┤
│ server-watch │ 0  │ fork │ 4711 │ online │         0 │ 0s     │ 10.473 MB   │  enabled │
└──────────────┴────┴──────┴──────┴────────┴───────────┴────────┴─────────────┴──────────┘
 Use `pm2 info <id|name>` to get more details about an app

should 'process should be watched' 'watch: true' 1
$pm2 prettylist | grep -o "$2" | wc -l
------------> ✔ process should be watched

echo "console.log('test');" >> server-watch.js

sleep 1

cat server-watch.js
var http = require('http');

http.createServer(function(req, res) {
  res.writeHead(200);
  res.end('hey');
}).listen(8000);
console.log('test');
$pm2 list
┌──────────────┬────┬──────┬──────┬────────┬───────────┬────────┬─────────────┬──────────┐
│ App name     │ id │ mode │ PID  │ status │ restarted │ uptime │      memory │ watching │
├──────────────┼────┼──────┼──────┼────────┼───────────┼────────┼─────────────┼──────────┤
│ server-watch │ 0  │ fork │ 4711 │ online │         0 │ 2s     │ 10.473 MB   │  enabled │
└──────────────┴────┴──────┴──────┴────────┴───────────┴────────┴─────────────┴──────────┘
 Use `pm2 info <id|name>` to get more details about an app

should 'process should have been restarted' 'restart_time: 1' 1
$pm2 prettylist | grep -o "$2" | wc -l
########   ✘ process should have been restarted