Some post processing features in Preview Scene Settings do not update immediately

In Persona or the Static Mesh Editor, some post processing features do not update immediately when the user changes them. This was seen with Color Grading and Lens Flare settings. It could affect more, but so far most have worked as expected.

The user can make these settings update by adding a new profile.

1. Open QAGame in editor.
2. Open a static mesh.
3. Focus the Preview Scene Settings tab.
4. Expand Post Process Settings > Color Grading.
5. Adjust the X value for Saturation.

RESULT:

The viewport does not update.

WORKAROUND:

Click the Add Profile button.