react app showing empty page when redirecting on production build – Nginx

I have a reactJs app which is running on a server that has nginx on it.
The problem is that when I try to redirect from HomePage("/") to /UserPanel or /AdminPanel
the url changes but it shows an empty page, but then when i reload the page, it works just fine.
This problem doesn’t occur in my localhost, but it happens to the production build.

this is my nginx config:

        listen 80 default_server;
        listen [::]:80 default_server;

       
        root /var/app/html;

        index index.html index.htm;

        location / {
                try_files $uri $uri/ /index.html?$args;
        }

And this is my main app class:

import { Route, Router, Switch } from "react-router-dom";

class App extends Component {
  render() {
    return (
      <Provider store={store}>
        <Snackbar />
        <Router history={hist}>
          <MuiThemeProvider theme={theme}>
            <CssBaseline />
            <GlobalStyles />
            <Pace color={theme.palette.secondary.main} />
            <Suspense fallback={<Fragment />}>
              <Switch>
                <PrivateRoute
                  path="/AdminPanel"
                  component={AdminPanel}
                />
                <PrivateRoute
                  path="/UserPanel"
                  component={UserPanel}
                />
                <Route exact path="/" component={HomePage} />
              </Switch>
            </Suspense>
          </MuiThemeProvider>
        </Router>
      </Provider>
    );
  }
}

And I am redirecting from HomePage like this:

const redirect = () => {
    let url = isAdmin
      ? URLConstant.ADMIN_PANEL
      : isUser
      ? URLConstant.USER_PANEL
      : null;
    if (url) {
      return (
        <Redirect
          push
          to={{
            pathname: url,
            state: {}
          }}
        />
      );
    }
  };

And I’m using "react-router": "^5.2.0", "react-router-dom": "^5.2.0", "history": "latest".

What am I doing wrong? Should I add anything other than urls in .env?
Thanks in advance.