[Ionic4] Modal not showing but no error is given

I am trying to show a modal in my app which previously worked without any issues. The page I’m trying to launch it from doesn’t appear to matter because I have the same result in any page, even the ‘legal’ pages where there isn’t any code really. I’m about 100% sure I have the modal component correctly declared in app.module.ts and I’m launching it correctly in my page file(s). Anyone have any experience with this?

page1.page.ts

// ...
import { GatherInfoComponent } from 'src/app/Modals/gather-info/gather-info.component';
// ...

  async gatherInfo() {
    console.log('Open Modal...');
    const modal = await this.modal.create({
      component: GatherInfoComponent,
      componentProps: { user: this.us }
    });

    return await modal.present().catch((error) => {
      console.log(error);
    });
  }

app.module.ts

// ...
import { GatherInfoComponent } from 'src/app/Modals/gather-info/gather-info.component';
// ...

@NgModule({
  declarations: [
    // ...
    GatherInfoComponent 
  ],
  entryComponents: [
    // ...
    GatherInfoComponent 
  ],

p.s.
As a test I created a new Ionic4 project with nothing but a test modal and it worked without a problem; so I don’t think this is an Ionic issue.

For those curious, I finally found the solution. I was blanket importing Twitter Bootstrap which has a .modal class. That modal class overwrote Ionic’s .modal which broke it’s display. Importing only what I needed fixed the issue.