How to reproduce:
1. Open the "Lighting.zip" project
2. Open the "SampleScene"
3. Place Game view and Scene view beside each other
4. Select the "Main Camera" GameObject in the Hierarchy
5. Remove the "MainCamera" tag in the Inspector
6. Observe the Scene view

Expected result: The lighting does not change
Actual result: The Cube is not as much lit up

Reproducible in: 2023.2.0a9, 6000.0.35f1, 6000.1.0b3
Not reproducible in: 2022.3.56f1, 2023.2.0a8

Reproduced on: Windows 11 Pro, MacOS 15.2 (M1)
Not reproduced on: No other environment tested