Transparent pixels are still hit when alphaHitTestMinimumThreshold is set to a non-zero value

Unity: uGUI Controls

6.5.X

6.4.X

6000.4.0a6

6.3.X

6000.3.0a3 onwards

6.2.X

6000.2.0b11 onwards

6000.2.16f1

6.0.X

6000.0.54f1 onwards

How to reproduce:

Open the "IN-121871.zip" project
Open the "InteractionTestScene" Scene
Enter Play Mode
Hover the mouse over the "Character_General" Sprite's head (furthest Sprite) in the Game view
Observe the Game view

Expected result: The furthest Sprite is highlighted
Actual result: The nearest Sprite is highlighted

Reproducible in: 6000.0.54f1, 6000.0.61f1, 6000.2.10f1, 6000.3.0b8, 6000.4.0a3
Not reproducible in: 6000.0.53f1

Reproduced on: Windows 11 Pro (24H2)
Not reproduced on: No other environment tested

Note: Tested with "alphaHitTestMinimumThreshold" values from 0.1 to 0.95 - all results were the same