Please see here: https://playground.babylonjs.com/#Z8HTUN#786
It seems, when syncing, the physics position takes 1 frame to catch up with the actual mesh position. In consequence the physics raycast misses.
You can fix this by waiting a frame before you shoot the ray. But say you shoot lots of physics raycasts in your code and that code is never async…
I tried havok.syncTransform but while it makes the ray hit, it voids the position update. (guess its syncing the other direction)