MotionController(L) Grip2 can't Exec why?

i use htc vive
motioncontroller(L) Grip1 execution Correct,But,motioncontroller(L) Grip2 can’t print “Grip2_Grip2_Grip2” and it print “Grip1_Grip1_Grip1”.why?

For anyone else who comes across this, both Grip buttons respond as Grip 1. I don’t know if it’s possible to override this.
See Vive Interface in Unreal - Imgur

How did you get it to respond to any buttons? For me none of the buttons trigger :frowning: