123878 (95% SECURE)

Understanding the specific request for "subject 123878" requires looking at the technical landscape, as this number is most prominently associated with a significant framework issue regarding the Material 3 App Bar .

The bug reported in issue #123878 highlights that on newer Android versions, the app bar elevation change simply doesn't activate when the user scrolls, leaving the UI feeling static and flat. Why It Matters 123878

While the Flutter team triages the official fix, many developers are using these strategies to regain that depth: 1. Manual Scrolled-Under Handling Material 3: Uses a surface tint color overlay

It maintains the "material" metaphor that Google's design language is built upon. Quick Fixes and Workarounds you’re scrolling away

In the transition from Material 2 to Material 3, the way elevation is handled changed significantly. Used shadows to indicate elevation. Material 3: Uses a surface tint color overlay.

If you’ve recently migrated your Flutter app to Material 3, you might have noticed something frustrating. You’ve set your elevation, you’re scrolling away, and… nothing. The app bar remains stubbornly flat against the background.