Reproduction steps:
1. Open the attached project “ReproProject”
2. Open the scene “Assets/Scenes/SampleScene_OldInput.unity”
3. In the Hierarchy Window, observe the “Case2” GameObject
4. Enable the “EventSystem_NewInput” GameObject
5. Enter Play mode
6. Click on the Game view
7. Observe the Console window

Expected result: “Parent OnPointerDown, Parent OnPointerUp, Child OnPointerClick” is displayed
Actual result: “Parent OnPointerDown, Parent OnPointerUp” is displayed

Reproducible with: 1.6.1, 1.7.0, 1.8.1 (2021.3.37f1, 2022.3.24f1, 2023.2.18f1, 6000.0.0b14)

Reproduced on: Windows 11 23H2 (22631.3007), Windows 10 (10.0.19045) 64bit (user’s)

Note:
To achieve the expected result use the Old Input system by doing the following:

• Disable the “EventSystem_NewInput” GameObject and enable“EventSystem_OldInput”
• Repeat steps 4 and 5