[firebase_messaging v6.0.1] iOS doesn't trigger onMessage() when app in foreground

[building-software-2018]

Describe the bug
iOS doesn't trigger onMessage() when app in foreground. But app is in background, it will trigger onResume() perfectly.
I test on Android, all is oke.

Additional context
Test on iPad mini 2 and Ios 12.4.3

flutter doctor

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.9.1+hotfix.6, on Mac OS X 10.15.1 19B88, locale en-GB)
[✗] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from: https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK components.
      (or visit https://flutter.dev/setup/#android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, set ANDROID_HOME to that location.
      You may also want to add it to your PATH environment variable.

 
[✓] Xcode - develop for iOS and macOS (Xcode 11.1)
[!] Android Studio (not installed)
[✓] Connected device (1 available)

! Doctor found issues in 2 categories.

[iapicca]

#1041

[rlee1990]

I have the same issue are there any updates this will affect an app release for a client

[Salakar]

Hey all 👋

As part of our roadmap (#2582) we've just shipped a complete rework of the firebase_messaging plugin that aims to solve this and many other issues.

If you can, please try out the dev release (see the migration guide for upgrading and for changes) and if you have any feedback then join in the discussion here.

Given the scope of the rework I'm going to go ahead and close this issue in favor of trying out the latest plugin.

Thanks everyone.