PWA app breakpoints and source code in the browser are messed up

I cannot put breakpoints in the correct position because it seems to be showing an older version of the sources in the browser.

How can I force it to update the source in the browser?

Solved. It seems to be caused by decorators occupying multiple lines like this:

@IonicPage({
    name: 'my-page',
    segment: 'my-page/:id',
    defaultHistory: ['my-other-page']
})
@Component({
    selector: 'my-page',
    templateUrl: 'my-page-cotacao.html',
    providers: [BrMaskerIonic3]
})

The solution is to set each decorator in a single line, like this:

@IonicPage({ name: 'my-page', segment: 'my-page/:id',    defaultHistory: ['my-other-page'] })
@Component({ selector: 'my-page', templateUrl: 'my-page.html', providers: [BrMaskerIonic3] })