KC828-Server unable to respond mqtt command until restart

[Jessica]

Yes, you are right, the problem is not the stopping of the mqtt broker service, after I stop mqtt broker, the http web page can also open.

I'm in stage of developing application on CM4, the following are the steps that make the KC868-Server service stop
1. Stop our application services ( including mqtt broker service ), KC868-Server service is still running
2. Build application with npm run build ( vue-cli-service build ), KC868-Server service is not running
3. Start application services to communicate with KC868-Server service

It was confirmed while building our application, KC868-Server http webpage can not be opened, but can be pinged.

I also tried rebooting CM4 but no effect, only power-off then back power-on to make KC868-Server service run again.