Steps for reproduction:
1) Download the project and change background color of reflection probe in scene `test`
OR
1) Create a new scene and disable Realtime GI and Baked GI
2) Disable Auto mode in lighting window
3) Switch Environment Reflections to Custom and Environment Lighting to Color
4) Create a static plane and a dynamic sphere in the hierarchy
5) Assign a reflection probe to dynamic sphere
6) Switch Reflection Probe type from `Baked` to `Realtime`
7) Change `Refresh Mode` of Reflection Probe to `Every frame`
8) Change `Background` color of Reflection probe
9) Observe the bug

Notes:
- Not a regression, it can be reproduced across all Unity versions that have Reflection Probes feature
- Complete Argument Exception is shared below
- Only occurs when Auto mode is disabled