Login page is not displayed - Angular 12 / Zuul Gateway

Question

I have angular app (port 4200) that communicate with Zuul spring boot gateway (port 7575). Gateway communicate with one spring boot app (port 8182) to find employe.

I have implemented spring security config in zuul whit userDetailsService.

Problem :

If I make the request from gateway :

Exemple : http://localhost:7575/api/employe/name/myname, I'm connected, so I am redirected to this page (http://localhost:7575/login) : default login page with spring boot security, so it's good

But, If I make the request from my angular App (I click on one button that call gateway and gateway redirect to the good service), I have in js console :

Js console

And login page is not displayed.

Code Angular :

public findEmployeeByName(employeeName: string) : Observable<Employe | undefined> {
return this.http.get<Employe>('http://localhost:7575/api/employe/name/' + employeeName);

}

Code Zuul :

http.cors().and()
            .formLogin()
            .and()
            .httpBasic()
            .and()
            .logout().permitAll().logoutSuccessUrl("/login").and().
            authorizeRequests()
            .antMatchers("/**").hasAnyRole("ADMIN")
            .antMatchers("/login").hasAnyRole("ADMIN")
            .antMatchers(HttpMethod.GET, "/api/employe/name/**").hasAnyRole("ADMIN")
            .anyRequest().authenticated()
            .and().csrf().disable();