The "IsHeadMountedDisplayEnabled" node always returns true if an oculus was detected when the project is opened

If the user has the oculus plugged in and turned on when they start up their project the "Is Head Mounted Display Enabled" node will always return true in PIE, even if the oculus is turned off.

1. Open the editor with the oculus rift hooked up and turned on
2. Open the level blueprint
3. Create the blueprint in the attached image
4. Play in Editor
5. Notice the Print string says true
6. Stop PIE
7. Turn off the oculus rift
8. Start PIE
9. Notice the Print String still says true

Expected: The Print string would return "true" when on and "false" when off
Result: The print string always returns true if a head mounted display was detected upon opening the project

[4.9 P1] "isHeadmountedDisplayEnabled" always reporting TRUE