Parenting an object to a prefab in editor doesn't enable hierarchal view on the prefab

[Remscar]

Describe the bug

sbox-dev_UfBieYmdRz.mp4

You can't see child objects on a prefab in the editor, even if it's an object you parented form inside the editor.

I can understand why you might not want to see child objects that belong to a prefab, but for children that don't belong to the prefab this creates a confusing user experience.

To Reproduce

1. Add a prefab to your scene
2. Create another object (prefab or not)
3. Parent the 2nd object to the 1st object
4. The 2nd object will seemingly disappear from the hierarchy view in the editor

Expected behavior

It should be possible to see the 2nd object as parented to the 1st object.

Media/Files

No response

Additional context

No response