Pawn Collision issue on < 60 fps


Ive got a pawn (character) that moves along surfaces like ramps (skateboard ramps). This works quite good when on good fps, but on lower fps < 60 the collision seems to interrupt the movement (the pawn slows down). When the pawn leaves the surface, the correct speed is applied again.

Does anyone knows how to fix it so the movement would be the same on low and high fps?