Angular components/directives are not recognized in WebStorm 2017.3.1

Hi, I have updated WebStorm to 2017.3.1 and now, when I create new Angular (v.5) components or directives from scratch (no generated by Angular-Cli), they are not recognized anymore. Previously I had the 2017.2.x version and it worked fine.

It might seem a real error or a mistake in the TSLint configuration but it's not:

• I'm using an empty new AngularCli project, 
• the application/example works fine 
• the error is not shown anymore after WebStorm reboot.

Anyway this issue still persists in my unit / integration tests, after reboot too.
In fact I always see this warning in my following test, after reboot too:

WARNING: 

CODE:

import { Component, ElementRef, ViewChild } from '@angular/core';
import { HighchartsComponent } from './highcharts.component';
import { ComponentFixture, TestBed } from '@angular/core/testing';

@Component({                         // <==== HERE THE ERROR SHOWN ABOVE <======
  selector: 'test-host-component',
  template: '<fb-chart [config]="chartData"></fb-chart>'
})
export class TestHostComponent {
  @ViewChild(HighchartsComponent) component: HighchartsComponent;
  // ...
}

describe('Highcharts component', () => {

  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [TestHostComponent, HighchartsComponent],
    });

    //...
  })

})

NOTE: I would like to avoid disabling Angular Services in WebStorm, as suggested in other posts

Thanks in advance
Fabio