Reproduction steps:

# Open the project “ReproRealtimeReflections”
# Build and run the project
# Observe the sphere in the middle
# Come back to the project
# Go into Project Settings > Graphics > Always Included Shaders and set Size to 0 (so no shaders are "always included")
# Build and run the project
# Observe the sphere in the middle

Expected result: The sphere is still reflective or a ‘shader missing’ error is thrown
Actual result: The sphere is no longer reflective

Reproducible with: 10.9.0 (2020.3.37f1), 12.1.7 (2021.3.8f1), 13.1.8 (2022.1.12f1), 14.0.3 (2022.2.0b4), 15.0.0 (2023.1.0a4)

Reproducible on: MacOS 12.2.1 (Intel)