Ionic 6 + Angular ion-button prevent to clear memory after page change

Question

I have a problem with Ionic 6 and ion-button. I use tabs and when I go to nested page and then click on back button page doesn't clear memory and I have memory leaks. I happens if I pass ion-button into ng-content. Such error happens even I just put native html button (just click me). If I pass into ng-content any other element such as ion-icon it works good.

I have the very simple test-component

@Component({
  selector: 'app-test-cmp',
  templateUrl: '<ng-content></ng-content>',
})
export class TestCmp {}

Here is my nested page

@Component({
  selector: 'app-test-page',
  templateUrl: `
    <ion-header>
      <ion-toolbar>
        <ion-buttons slot="start">
          <ion-back-button></ion-back-button>
        </ion-buttons>
        <ion-title>Test</ion-title>
      </ion-toolbar>
    </ion-header>

    <ion-content>
      <app-test-cmp><ion-card>anything here</ion-card></app-test-cmp>
    <ion-content>`,
})
export class TestPage {}

This code works well. Here is my memory snapshot.

But if I put ion-button into ion-card memory doesn't clear.

@Component({
  selector: 'app-test-page',
  templateUrl: `
    <ion-header>
      <ion-toolbar>
        <ion-buttons slot="start">
          <ion-back-button></ion-back-button>
        </ion-buttons>
        <ion-title>Test</ion-title>
      </ion-toolbar>
    </ion-header>

    <ion-content>
      <app-test-cmp><ion-button>Ionic button</ion-button></app-test-cmp>
    <ion-content>`,
})
export class TestPage {}

Here is memory snapshot

Please, any help/ideas/etc. WebView fails on iOS after surfing between pages

Update

It's somehow connected to ion-content

This code works correctly but crash animation, etc.

@Component({
  selector: 'app-test-page',
  templateUrl: `
    <ion-header>
      <ion-toolbar>
        <ion-buttons slot="start">
          <ion-back-button></ion-back-button>
        </ion-buttons>
        <ion-title>Test</ion-title>
      </ion-toolbar>
    </ion-header>

    <app-test-cmp><ion-button>Ionic button</ion-button></app-test-cmp>

    <ion-content>
      ......
    <ion-content>`,
})
export class TestPage {}