Changing World to Meters scale at runtime disrupts HMD rendering on HTC Vive

I have a bug with world scale, mine is different again it seems, since setting world to meters no longer changes your perceived scale in vr (eg the distance between your eyes stays the same) instead all it does is multiplies the tracking input, so setting the scale to 200 I feel twice the height from the floor, and move twice as fast as I do in reel life, but im the exact same scale as at 100… huge problem since the whole point of this game is being able to mess with scale