Steps to reproduce:
1. Create new builtin template
2. Create a new material
3. Set it to fully metallic and smooth
4. Select the created material and go to inspector preview
5. Select any reflection probes to be displayed in preview
6. Observe the reflection probe is not displayed in preview
Expected result: Material Preview should show selected Reflection Probes
Reproduced in: 2021.2.0a20, 2019.4.26f1
Reproduces in: Built-in, URP, HDRP pipelines