[SwiftUI] Cursor system is unreliable

Number:rdar://FB9045245 Date Originated:2021-03-16
Status:Open Resolved:No
Product:SwiftUI / macOS Product Version:
Classification:Incorrect/Unexpected Behavior Reproducible:Yes
Please describe the issue:
The cursor system simply does not work with SwiftUI, specially when relying on `onHover` to modify the cursor.
Please list the steps you took to reproduce the issue:
1. Open the attached project and run it
2. Hover each of the buttons with the mouse pointer.
3. The first button will modify the cursor appropriately
4. The last 3 buttons will not since they use `onHover `

What did you expect to happen?
All buttons should present a `pointingHand` cursor when hovering regardless of their style.

What actually happened?
The cursor system is reset and becomes unreliable if the view updates (by applying a style, for instance)



Check https://github.com/fjcaetano/not-awesome-swiftui

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