Reproduction steps:
1. Open project “ReflectionBug.zip”
2. Open “Sphere” Prefab by clicking the little arrow icon next to the GameObject in the Hierarchy

Expected result: the reflection is still visible
Actual result: the reflection is not visible

Reproducible with: 2021.2.0a11, 2021.3.24f1, 2022.2.0a16
Not reproducible with: 2020.3.48f1, 2021.2.0a10, 2022.2.18f1, 2023.1.0b15, 2023.2.0a13
Fixed in: 2022.2.0a17

Reproducible on: macOS Ventura 13.2.1 (Intel)

Notes:
- The reflection is still not visible after exiting the Prefab
- Also reproducible in Standalone Player

Workaround: go to “Window\Rendering\Lighting”, click on “Environment”, under "Environment Reflections", change Source to "Custom" and back again to "Skybox"