Repository: flutter
Issue: [mobile_web][iOS] TextField and other Column content is pushed beyond view on TextField re-entry after "Done" shortcut is tapped 
Labels: a: text input,platform-web,has reproducible steps,assigned for triage,P2,browser: safari-ios,team-web,triaged-web,found in release: 3.16,found in release: 3.20

## Steps to Reproduce

Minimal code to reproduce is here: https://www.dartpad.dev/?id=8d636c9ce2e71951d0354b74d5f75b47
1. Execute code in iOS **mobile** browser (Safari or Chrome)
2. Tap into TextField; keyboard opens
3. Select "Done" action above the keyboard; keyboard closes
4. Tap into TextField; keyboard opens, TextField is now padded beyond visible area and is no longer aligned in the `Column` at the `end` which should be directly above the keyboard.

**Expected results:**
After selecting "Done" and re-entering `TextField`, expect that `TextField` remains directly above Keyboard when `Column` `MainAxisAlignment` is sent to `end`.

**Actual results:** 
The `TextField` is padded beyond visible area by an amount approximately equivalent to the keyboard - any content above the `TextField` is also obscured from vision and use.

```
[✓] Flutter (Channel stable, 2.10.2, on macOS 12.0 21A344 darwin-arm, locale en-AU)
    • Flutter version 2.10.2 at /Users/danielkerwin/Sites/flutter-sdk
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 097d3313d8 (4 days ago), 2022-02-18 19:33:08 -0600
    • Engine revision a83ed0e5e3
    • Dart version 2.16.1
    • DevTools version 2.9.2

[✓] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1)
    • Android SDK at /Users/danielkerwin/Library/Android/sdk
    • Platform android-32, build-tools 32.1.0-rc1
    • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7772763)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.2.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2021.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7772763)

[✓] VS Code (version 1.64.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.34.0

[✓] Connected device (3 available)
    • sdk gphone64 arm64 (mobile) • emulator-5554                        • android-arm64  • Android 12 (API 31) (emulator)
    • iPhone 13 (mobile)          • 7B398F5B-9DB5-4385-9A5A-74529963C47A • ios            • com.apple.CoreSimulator.SimRuntime.iOS-15-2 (simulator)
    • Chrome (web)                • chrome                               • web-javascript • Google Chrome 98.0.4758.102

[✓] HTTP Host Availability
    • All required HTTP hosts are available
```

**Screenshots from iOS Mobile Web:**

1 -- TextField is aligned correctly at `MainAxisAlignment.end`
![#1 - TextField is aligned correctly](https://user-images.githubusercontent.com/13343761/155281515-0b6bc088-6b6c-4f62-8ac1-799c2b744960.png)

2 - User enters TextField, Keyboard opened; User taps "Done"
![#2 - User enters TextField, Keyboard opened; User taps "Done"](https://user-images.githubusercontent.com/13343761/155281526-700e5c32-3e1e-493f-bc3c-929b6dc4525c.png)

3 - User re-enters TextField after tapping "Done"; large block of padding added between keyboard and TextField
![#3 - User re-enters TextField after tapping "Done"](https://user-images.githubusercontent.com/13343761/155281530-44ce2c3f-7a0a-4925-aed1-7f54a73f2b2e.png)


**Recording of issue reproduced on iOS Simulator**
**Note:** issue is slightly different in iOS Simulator but is consistent in that on "Done" tap, the `TextField` is padded above the keyboard by a given amount, but in iOS Simulator, the keyboard does not remain closed (it starts to close, then opens again immediately)

https://user-images.githubusercontent.com/13343761/155266092-79fe2834-2e71-44f3-b080-1c884978f19a.mov