Angular: Extending Ionic classes with AOT compilation

Ionic Framework
1

I created a class that extends from the @ionic/angular node_module. However, AOT doesn’t like it one bit.

Does NOT compile:

import {
  ChangeDetectorRef, ComponentRef, ElementRef, Injectable, NgModule, NgZone
} from '@angular/core';
import { IonProgressBar, IonToolbar } from '@ionic/angular';

import { DomService } from '../services/dom.service';

export class IonProgressBarExtended extends IonProgressBar {
  constructor(
    private c: ChangeDetectorRef,
    private r: ElementRef<any>,
    public z: NgZone,
    private componentRef: ComponentRef<typeof IonProgressBar>,
    private domService: DomService
  ) {
    super(c, r, z);
  }
  // ...
}

Does compile, but obviously doesn’t work:

export class IonProgressBarExtended {
  constructor(
    private c: ChangeDetectorRef,
    private r: ElementRef<any>,
    public z: NgZone,
    private componentRef: ComponentRef<typeof IonProgressBar>,
    private domService: DomService
  ) {
    // super(c, r, z);
  }
  // ...
}

The ProgressBarModule is imported in the app.module.ts and it works fine with ng serve and non-prod builds. However, once the AOT is called with the --prod build flag, I get the following error:

Cannot determine the module for class IonProgressBarExtended in /Users/Reed/source/repos/IonicSideMenuPOC/src/app/shared/controllers/progress-bar-controller.ts! Add IonProgressBarExtended to the NgModule to fix it.

I have confirmed this on a completely new Ionic project, and have confirmed that it’s not a duplicate import issue. Has anybody else dealt with this?