Preview Scene - Lighting angle changes between Profiles

When previewing an object, the lighting angles change between profiles; the lighting position at '0' will also change when the Lighting Rig Rotation is set to another value, then back to 0 again. 

Reported and tested in version 4.25.3 (CL-13942748) and version 4.24.3 (CL-11590370). 

1. Create new project with starter content.
2. Open mesh editor for shape_sphere (or any mesh).
3. Open Preview Scene Settings.
4. Create a new preview scene profile.
5. Adjust Lighting Rig Rotation to some value, then back to 0.
6. Switch between the default profile and the new profile.

Results: When the Preview Scene Settings is first opened, the directional light rotation is set to 0, but is oriented in an arbitrary rotation. This is demonstrated by switching between two saved profiles as described above. Both have rotation set to 0 but the light is in a different orientation in each profile.

Expected: The orientation of the directional light should point down positive X when the Preview Scene is first opened.