How to reproduce:
1. Open the attached “shader_issue” project
2. In the Project window, select the “sh” shader
3. In the Inspector, click “Compile and show code”
4. Using the search function (CTRL+F) find different entries for “UnityPerDraw”
5. Observe the amount of fields contained in each constant buffer

Expected result: All fields declared in the constant buffer are present
Actual result: Some fields are removed upon shader compilation

Reproducible in: 2021.3.34f1, 2022.3.17f1, 2023.2.4f1, 2023.3.0b1

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