Subtitle settings are ignored after editor restart

If the Subtitles Enabled setting is set to false, subtitles will still display after restarting the editor regardless of Subtitles Forced Off setting.

1. Open UE4 Editor
2. In Project Settings->Engine->General Settings, ensure that Subtitles Enabled is true
3. In the Content Browser add the following assets from the Sounds section
   • 2 Dialogue Voices
   • Dialogue Wave
   • Media SoundWave
   • Sound Cue
4. Open DialogWave
5. Set DialogVoices as Speaker and Directed At
6. Expand Dialogue Contexts and set SoundWave to the Media SoundWave asset
7. In Script Section, fill in Spoken Text field (this will provide the subtitles)
8. Open the Sound Cue and drag in the DialogWave
9. Wire DialogWave to Output
10. Open the level blueprint and add SpawnSound2D node
11. Set Sound to the SoundCue
12. Wire SpawnSound2D node into BeginPlay
13. PIE (subtitles are displayed)
14. Uncheck the Subtitles Enabled setting
15. PIE (Subtitles are not displayed)
16. Restart the editor and ensure Subtitles Enabled is still unchecked
17. PIE

Result:
Subtitles are displayed again even though Subtitles are set to off. Checking Subtitles Forced Off to true still displays the subtitles after the editor restarts.