Flight stick input is not read consistantly

When using a flight stick as a raw input device, GenericUSBController Button # blueprint events will sometimes not be registered when clicked. In local testing, this occurred roughly once for every 15 button presses.

Regression:
No - raw input plugin not available prior to 4.15

1. Connect Flight Stick device
2. Create Flying Template project
3. Add blueprint based on actor
4. Set Auto Receive Input to Player 0
5. Setup event graph as shown in attached screenshot
6. Add instance of blueprint to the viewport
7. PIE
8. Press USB controller button 1 repeatedly

Result:
A few of the button presses are not picked up, the counter does not increase