Issue with scrolling ion-slides in modal

I’m having an issue with using ion-slides in a modal created with ModalController.

The slides are swiping horizontally just fine, but when I try to scroll vertically on a single slide the screen sometimes freezes and prevents scrolling. This is happening on iOS.

After trying to scroll a few times it usually goes back to working, but I’m wondering if anybody else has run into this issue?

      Extra long content in this slide, including multiple cards

This is the code I’m using to open the modal:

async presentModal() {
    const modal = await this.modalCtrl.create({
      component: TestModalComponent
    return await modal.present();