This problem is haunting my soul in 4.15. I am trying to track a MIDI keyboard and it works fine if I just drop it in my scene, the moment I try to even use the motion controller component to establish the keyboards location it introduces huge amounts of lag or jitters, even with low latency update unchecked(if anything it makes it worse). The terrible thing is without a solution it’s looking like I won’t be able to effectively complete my thesis project. I have slammed my head against the wall all summer fighting this game wrecking problem. I really don’t understand how anyone is shipping a UE4 VR title like this. This is the most horrible problem I have ever dealt with and I can’t find solution other that pulling my hair out and questioning why the hell I am even trying to do this.