Scroll wheel behavior differs significantly in new architecture (Windows App SDK) vs WinUI 3 Gallery app

[Ferry-200]

version:

{
  "dependencies": {
    "react": "19.0.0",
    "react-native": "0.78.0",
    "react-native-windows": "^0.78.0"
  }
}

I'm testing the React Native for Windows app using the new architecture (Windows App SDK). I noticed that the scroll wheel behavior is significantly different.

In the new architecture (Windows App SDK), scrolling with a mouse wheel feels much less responsive. The number of lines scrolled per wheel notch is considerably smaller compared to both the React Native Windows Gallery app and the official WinUI 3 Gallery app. As a result, scrolling through content feels sluggish and requires much more effort from the user.

This issue makes basic interaction in list views and scrollable content frustrating.

Any helps? Thanks!

5.6.mp4

[chrisglein]

Thanks for trying out the new architecture and for taking the time to do a detailed comparitive analysis. I've turned this discussion into a bug report: #14653