Details

Target Platform: iOS
Target OS version/browser: 15.5
Devices: iPhone 11 standard 60hz not promotion

Scrolling is janky and laggy on stable 3.0.1, latest master, updated Xcode, and iOS 15.5 and goes away when screen recording is turned on or landscape mode. It feels like it is running on debug mode or half the frames. Below is a video that shows the issue. If you exit to home screen and open app up again the scrolling also returns to smooth for a while. But exiting app completely and restarting has low framerate all throughout. App in video is on release mode.

On Android release the app is smooth as butter so this is an iOS issue and goes away with screen recording or landscape.

https://drive.google.com/file/d/1VLq-4vqUpaPDxRBgGPJMAZRCUw50YIUF/view?usp=sharing

The app is rather complex but nothing out of the ordinary so I cannot list a reproducible file. However this issue seems to be the same one as noted by people in these issue threads:

#31086

Logs

Flutter doctor shows no issues

<!-- Finally, paste the output of running `flutter doctor -v` here, with your device plugged in. -->
Running "flutter pub get" in flutter_tools...                       4.5s
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.0.1, on macOS 12.3.1 21E258 darwin-x64, locale
    en-ZM)
[✓] Android toolchain - develop for Android devices (Android SDK version
    32.1.0-rc1)
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 2021.2)
[✓] Connected device (2 available)

• No issues found!