Jump Controls on NVIDIA SHIELD?

Hello, I am experiencing an issue when deploying a level from UE4 to my NVIDIA SHIELD. The application starts up fine (ignoring the lighting issues) on my SHIELD and navigation controls work, but there is no way for me to jump. Am I missing something, or was this done intentionally by the engine itself?

Thanks for any answers!

From experience, none of the face buttons seem to work for me either. The back triggers do, which is odd. I would recommend implementing the controls you want on the screen itself until a solution can be found.