Reproduction steps:
1. Create a new Universal 2D project
2. Create any Sprite (Create > 2D > Sprite)
3. Click “Open Sprite Editor” button to open Sprite Editor window
4. Press Sprite Editor dropdown and select “Skinning Editor”
5. Click the “Visibility” button
6. Change Sprite Weight Opacity value in the Visibility Overlay

Actual result: Sprite Weight Opacity updates only while dragging the slider, but returns to the default value after the slider is released
Expected result: Sprite Weight Opacity changes according to the field value

Reproducible with: 2023.3.0a2, 6000.0.72f1, 6000.3.12f1, 6000.4.1f1, 6000.5.0b2, 6000.6.0a2

Reproduced on: macOS Tahoe 26.3 (M4), Ubuntu 24.04

Note: Issue is not reproducible when Auto Geometry, Auto Weights, Weight Slider, Weight Brush, Bone Influence or Sprite Influence tools are selected