The PostProcessSceneAttribute callback is not invoked when the Player is built more than once

Reproduction steps:
1. Delete the “Library” folder included in the "ReproProj" project
2. Open the project
3. From the menu bar, select “Test > Build”
4. Create a new output folder and select it
5. Wait for the build to finish
6. Confirm that “Post-processing scene after build…” appears in the Console window
7. Clear the Console
8. Repeat steps 3–5 once more
9. Observe the Console

Expected result: Log message “Build succeeded: 87671610 bytes” is present
Actual result: “Build succeeded: 87671610 bytes” does not exist

Reproducible with: 2022.3.62f1, 6000.0.52f1, 6000.1.9f1, 6000.3.0a1

Testing environment: Windows 10 Enterprise 21H2
Not reproducible on: No other environment tested

Note:

• Also reproducible when using EditorSceneManager.MarkSceneDirty