Reproduction steps:
1. Open the attached “1563442.zip“ project
2. Move the “CustomPassTest.cs” Script to the “Assembly1" folder
3. Select “PrefabCamera.prefab” Prefab and observe the Console

Expected result: No errors are thrown
Actual result: “ArgumentNullException: Value cannot be null. Parameter name: key” errors are thrown

Alternate reproduction steps:
1. Open the attached “1563442.zip“ project
2. Open “PrefabCamera.prefab” with any text editor
3. Observe the type of the Custom Pass Object
4. Move the “CustomPassTest.cs” Script to the “Assembly1" folder in the Editor
5. Repeat steps 2-3

Alternate expected result: The type of the Custom Pass Object is updated
Alternate actual result: The type of the Custom Pass Object is not updated

Reproducible with: 2020.3.48f1, 2021.3.26f1, 2022.2.21f1, 2023.1.0b18, 2023.2.0a17

Reproduced on: macOS Ventura 13.3.1 (Intel)

Note: Not reproducible in Player