In HDRP, default reflection probe is not disabled during the first iteration of reflection probe rendering. It is expected that the first reflection probe render pass should not apply any reflections to GameObjects.
This is an issue that demo team encountered and as a workaround, they use a custom script to fill out the default reflection probe cubemap as black so that it doesn't affect the reflection of other GameObjects in the scene.

Steps for reproduction:
1) In Unity hub, open `High End SRP` template (or fetch Sample Game project)
2) Observe the issue

Notes:
- A discussion link is shared below
- Custom script solution used by demo team is attached to the case