Angular 8 app component selectors are hiding on app componen

I am using angular 8 for my project. after editing anything in the app component files(.ts, .css, .html) all the selectors used in the page are set as hidden. only the title showing in the page. while checking in the console, it is showing 2 messages. one was, “[WDS] Disconnected!” in the client.js file and the second was “[WDS] Live Reloading enabled”. I need to re run using the ng serve command each time. Please help me to resolve my issue.