How to reproduce:
1. Open the “IN-96430_OnPostprocessAllAssets” project
2. Clear the Console
3. From the top menu select "My Bug Report” > “Allow Post Process Bug Again"
4. Select the "Assets/not ok/b" Prefab
5. Observe the Transform Position being at (0;0;0)
6. Select the "Assets/not ok/a" Asset
7. Change value to 10
8. Save changes (Ctrl + S)
9. Select the "Assets/not ok/b" Prefab
10. Observe Prefabs Transform Position value now being at (1;1;1)
11. Observe the Console

Expected result: Console logs show all modified Assets
Actual result: Console logs show only Asset “a”

Reproducible with: 2022.2.0a1, 2022.3.59f1, 6000.0.41f1, 6000.1.0b9, 6000.2.0a6
Not reproducible with: 2021.3.49f1, 2022.1.0b1

Reproducible on: macOS 15.3.1 (M1 Max), Windows 11 (by user)
Not reproducible on: no other environments tested

Note: If you do not set Asset “a” to Dirty, the issue does not reproduce