Reproduction steps:
1. Open the attached “IN-103291.zip” project
2. Open the “SampleScene”
3. Observe the Game view

Expected result: The middle circle Sprite is not affected/overlapped by the two circle Sprites behind it
Actual result: The middle circle Sprite is affected/overlapped by the two background Sprites

Reproducible with: 6000.0.50f1, 6000.1.6f1, 6000.2.0b3
Not reproducible with: 2022.3.62f1

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Notes:
- Expected behavior can be seen by selecting the “circle-Sprite” from Hierarchy and in the Inspector, disabling the “Shadow Caster 2D” Component
- Could not find the regression point due to the downgrade providing inconsistent results; sometimes the same version would reproduce and not reproduce on different occasions. Upgrading the project provided with the 2022.3 version makes the issue not reproducible in 6000.0. Therefore, it might be something related to creating the project with Unity 6