Operating system:macOS 10.15.2
Graphics card:Radeon Pro 580X 8 GB
Broken:2.82 Beta 2020-01-22 12:36 Hash:a60a623a1ac5
Short description of error
Adding very weak emissions to the scene weakens the highlights in cycles render
Exact steps for others to reproduce the error
Uploaded blend file has strong emission, very weak emission and background light.
Very weak emissions have keyframes, 1 frame has a value of 0, and 2 frame have a value of 0.001.
Comparing the rendered images shows that the highlights of the 2 frame is weaker than the highlights of the 1 frame.
It seems strange that the highlights get weaker if you add a very weak emission that does not affect the scene.
Not included in the video, but placing very weak emissions close to strong emissions has the same effect.
If you add weak radiation, I think it will be a bit brighter, but the result will be darker.