vim-surround issues with template strings on new lines

Template strings that contain new lines cannot be altered with any vim-surround commands.

@Component({
  selector: 'app-root',
  template: `
    <h1>Welcome to {{ title }}!</h1>
    <app-heroes></app-heroes>
  `,
  styleUrls: ['./app.component.scss'],
})

Only work around is to make the string single line, then you can manipulate the grave accents.

  template: ` <h1>Welcome to {{ title }}!</h1> <app-heroes></app-heroes> `,

The report concerns vim-surround commands applied to multiline template strings in the VS Code TypeScript extension. Start by reproducing the shown Angular-style example and trace how vim-surround handles template-string delimiters; done means surround operations work across newlines without requiring a single-line string.