P2 physics - Bouncing (restitution) on same material and mass

[Threedy]

Hi there.

I want to collide a ball A with another ball B in a zero gravity world. Both balls have the same mass and (max) restitution and stiffness.

When A collides with B, I see that B's reaction is ''exaggerated'' and flies away, which is good for my purposes. However, I see that A is barely affected. I would prefer if A's reaction is also exaggerated and bounces back a lot rather than staying on basically the same area of the collision. 

Does anybody know what type of settings I have to change?

 contactMaterial.friction = 0.3;     // Friction to use in the contact of these two materials.
    contactMaterial.restitution = 1.0;  // Restitution (i.e. how bouncy it is!) to use in the contact of these two materials.
    contactMaterial.stiffness = 1e7;    // Stiffness of the resulting ContactEquation that this ContactMaterial generate.
    contactMaterial.relaxation = 3;     // Relaxation of the resulting ContactEquation that this ContactMaterial generate.
    contactMaterial.frictionStiffness = 1e7;    // Stiffness of the resulting FrictionEquation that this ContactMaterial generate.
    contactMaterial.frictionRelaxation = 3;     // Relaxation of the resulting FrictionEquation that this ContactMaterial generate.
    contactMaterial.surfaceVelocity = 0;        // Will add surface velocity to this material. If bodyA rests on top if bodyB, and the surface velocity is positive, bodyA will slide to the right.