bug: ios, scroll latching incorrect on pwas

# Bug Report

**Ionic version:**

[ ] **4.x**
[x] **5.x**

**Current behavior:**
Scroll no longer works normally after opening the keyboard on IOS/PWA only

**Expected behavior:**
Scroll should work the same as before opening the keyboard

**Steps to reproduce:**
Open/close keyboard touch header and start scrolling.

**Related code:**


```

Blank

import { IonContent, IonHeader, IonPage, IonTitle, IonToolbar } from '@ionic/vue';
import { defineComponent } from 'vue';

export default defineComponent({
name: 'Home',
components: {
IonContent,
IonHeader,
IonPage,
IonTitle,
IonToolbar
}
});

```

**Other information:**

**Ionic info:**

```

Ionic:

Ionic CLI : 6.12.4 (C:\Users\Maxime\AppData\Roaming\npm\node_modules\@ionic\cli)
Ionic Framework : @ionic/vue 5.5.5

Capacitor:

Capacitor CLI : 2.4.6
@capacitor/core : 2.4.6

Utility:

cordova-res : not installed
native-run : 1.3.0

System:

NodeJS : v14.8.0 (C:\Program Files\nodejs\node.exe)
npm : 6.14.11
OS : Windows 10

```

Start by reproducing the behavior in the provided Ionic Vue template on an iOS PWA: open and close the keyboard, touch the header, and scroll. Compare scrolling before and after the keyboard interaction, using the listed @ionic/vue components and version information as context. Done means scrolling behaves normally after the keyboard is opened and closed.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.