I'm seeing a rendering bug on Android that does not appear on iOS. The issue occurs when painting with a blur in a CustomPainter.

The offending Paint configuration is:

blurPaint = Paint()
          ..imageFilter = ImageFilter.blur(sigmaX: 10, sigmaY: 10)
          ..color = Colors.red;

On iOS, we see the expected result:

However, on Android, whether using an emulator or a physical device, we see this:

There appears to be some kind of quadrant artifact in the rendered result.

Flutter version:

Flutter 1.19.0-2.0.pre.15 • channel master • https://github.com/flutter/flutter.git
Framework • revision c969b8a (2 days ago) • 2020-05-11 15:28:10 -0700
Engine • revision ada8a0f
Tools • Dart 2.9.0 (build 2.9.0-8.0.dev a6d06b59ec)

Repro project:

https://github.com/matthew-carroll/flutter_bug_repro_57180