*Steps to reproduce:*

It's recommended to watch the reproduction steps video first [^ReproStepsVideo.mkv]
# Download and open the attached project ([^CustomReflectionProbe_Bug.zip])
# Open SampleScene
# Navigate to Lighting window, and click on Generate Lighting
# Once the bake had finished, select Plane and Sphere game objects, and mark them as Static
# Generate lighting again
# Select Reflection Probe - Custom GameObject, click on Bake button in the Inspector, and verify the output
# Drag a green material on top of the Sphere or the Plane
# Generate lighting again

*Expected result:*
* Custom reflection probe remains unchanged

*Actual result:*
* Custom reflection probe reverts to its previous state

*Notes:*
* Reproduces with CPU and GPU lightmappers
* Reproduces in all render pipelines
* Reproduces in Windows and macOS
* It's a very difficult issue to reproduce reliably