Единство - частицы не ведут себя так, как предполагалось тоже

Question

Частицы воды иногда проходят через линию, и они не должны этого делать. Вот изображение для справки: https://ibb.co/hL8RjT4

Как видите, пузырьки воды проходят через ту линию, которая должна удерживать воду. Есть идеи, как это исправить?

Это скриптГенератор частиц:

using UnityEngine;
using System.Collections;

public class ParticleGenerator : MonoBehaviour {

    public float WaterSpawnTimeInterval = 0.01f;        //How much time until the next particle spawns
    public float TapClosingTime = 2.5f;                 //How much time iy will take to close the tap
    float lastSpawnTime = float.MinValue;               //The last spawn time
    private Vector3 particleForce;                      //Is there a initial force particles should have?
    private Transform particlesParent;                  //Where will the spawned particles will be parented (To avoid covering the whole inspector with them)

    void Start() {
        Invoke("TapClose", time: TapClosingTime);
        GetComponent<AudioSource>().Play();
        particlesParent = this.transform;
        if (transform.eulerAngles == Vector3.zero)
        {
            particleForce = Vector3.zero;
        }
        if (transform.eulerAngles.z == 90)
        {
            particleForce = new Vector3(90,0,0);
        }
        if (transform.eulerAngles.z == 270)
        {
            particleForce = new Vector3(-90, 0, 0);
        }
    }

    void FixedUpdate()
    {
        if (lastSpawnTime + WaterSpawnTimeInterval < Time.time)                                                 // Is it time already for spawning a new particle?
        { 
            GameObject newLiquidParticle = (GameObject)Instantiate(Resources.Load("DynamicParticle"));          //Spawn a particle Dont remove the particle from resource folder
            newLiquidParticle.GetComponent<Rigidbody2D>().AddForce(particleForce);                              //Add our custom force
            DynamicParticle particleScript = newLiquidParticle.GetComponent<DynamicParticle>();                 // Get the particle script
            newLiquidParticle.transform.position = new Vector3(Random.Range(transform.position.x - .001f, 
                transform.position.x + .001f), Random.Range(transform.position.y - .001f, max: transform.position.y 
                + .001f), 0);                                                                                   // Relocate to the spawner position
            newLiquidParticle.transform.parent = particlesParent;                                               // Add the particle to the parent container         
            lastSpawnTime = Time.time;                                                                          // Register the last spawnTime          
        }
    }

    void TapClose()
    {
        GetComponent<AudioSource>().Stop();
        GetComponent<ParticleGenerator>().enabled = false;
    }
}

А вот сценарий DynamicParticle:

using UnityEngine;
using System.Collections;

public class DynamicParticle : MonoBehaviour {

    public float GasFlotability = -.5f;                      //How fast does the gas goes up
    public float particleLifeTime = 1f;                      //How much time before the particle scalesdown and dies    
    float startTime;
    float scaleValue;
    bool gas;

    void FixedUpdate()
    {
        ScaleDown();
    }

    // The effect for the gas particle to seem to fade away
    void ScaleDown()  
    {
        if (gas)
        {
            scaleValue = 1.0f - ((Time.time - startTime) / particleLifeTime);
            Vector2 particleScale = Vector2.one;
            if (scaleValue <= 0)
            {
                Destroy(gameObject);
            }
            else
            {
                particleScale.x = scaleValue;
                particleScale.y = scaleValue;
                transform.localScale = particleScale;
            }
        }
    }
    void OnBecameInvisible()
    {
        if (FindObjectOfType<GameManager>())
        {
            FindObjectOfType<GameManager>().WaterCheck();
        }       
    }
    void OnCollisionEnter2D(Collision2D other)
    { 
        if (other.transform.tag == "Hot")
        {
            startTime = Time.time;
            gas = true;
            Destroy(GetComponent<TrailRenderer>());
            GetComponent<SpriteRenderer>().color = new Color(.7f, .7f, .7f, 1);
            GetComponent<Rigidbody2D>().velocity = Vector3.zero;
            GetComponent<Rigidbody2D>().gravityScale = GasFlotability;
            GetComponent<Collider2D>().enabled = false;
            GetComponent<SpriteRenderer>().sortingOrder = 3;
        }
    }
}