[4.0.0-beta.5] Cannot close modal 'overlay does not exist'

After updating to Ionic 4.0.0-beta.5, I get the following error when calling dismiss() on a ModalController when I click on a button:

console.js:35 Error: Uncaught (in promise): overlay does not exist
    at resolvePromise (zone.js:814)
    at resolvePromise (zone.js:771)
    at zone.js:873
    at 

Closing the modal through the backdrop works normally.

[pyboosted]

@bleuscyther if we pass 1 as the last argument, it works only for the first dismissing. We can write something like:

this.modalController.dismiss(null, undefined, null);

it would work. But still looks like bug.

[doender]

@woodstream Indeed, I have found the same in the case of modal overlays.

This works (within the component launched as a modal):

constructor(private ctrl: ModalController) {}

public async close() {
   const modal = await this.ctrl.getTop();
   modal.dismiss();
 }

but this doesn’t:

constructor(private ctrl: ModalController) {}

public close() {
   this.ctrl.dismiss();
 }

whereas the latter used to work in the previous version.

I am now using this method as a workaround.