Unable to Teleport from start

I have a problem with my Pawn for HTC Vive. I cannot use the teleportation effect (the set actor location node with a linetrace) without having used a movement input. After pressing for example W once, everything works fine. I use the Floating Pawn Movement-component in my Blueprint. I really tried everything even using the Begin Play event to hammer in a value once (I know that this was a cheesy idea), but nothing works. Please help!