Contact sensors detecting the same

Omniverse Isaac Sim
1

i have this code:

def add_contact_sensors_around_circle(radius, num_sensors, x_position):
sensors =
angle_increment = 2 * np.pi / num_sensors # Angle between each sensor
for i in range(num_sensors):
angle = i * angle_increment
y_position = radius * np.cos(angle)
z_position = radius * np.sin(angle)
rad = 0.005

    # Create a visual sphere at the same position as the contact sensor
    sphere = VisualSphere(
        prim_path=f"/World/UR10/ee_link/transparent_sphere_{i}",
        name=f"transparent_sphere_{i}",
        translation=[1.18 + y_position, 0.45, 0.05 + z_position],  # Position relative to the end effector
        scale=[rad, rad, rad]  # Adjust scale as needed
    )

    # Add the sphere to the world
    my_world.scene.add(sphere)
    
    # Create and configure the contact sensor
    sensor = ContactSensor(
        prim_path=f"/World/UR10/ee_link/transparent_sphere_{i}/contact_sensor_{i}",
        name=f"suction_cup_contact_sensor_{i}",
        min_threshold=0,
        max_threshold=10000000,
    )

    # Add the sensor to the world
    my_world.scene.add(sensor)
    sensors.append(sensor)

return sensors

to add 6 different sensor into a 6 spheres attatched to a gripper. the problem is that they act as a single sensor, when opne senses all detect the contact. i tried moving them very far, but nothing works.