Freezing move with joystick

Target Platforms Mobile
1

Hello, im new in andoid and i try to create some basic runner game, I have basic joystick for control moving and button for jump, problem is when i force player in to the wall and then turn to oposite side my control freez, player slowly move and i cant stop it, i must restart game to fix it. It happend sometimes in different situation.
(all controls just freez and cant do anything).

This is my script for control joystick:

private Image bgImg;
    private Image joystickImg;

    public Vector3 InputDirection { set; get; }

    private void Start()
    {
        bgImg = GetComponent<Image>();
        joystickImg = transform.GetChild(0).GetComponent<Image>();
        InputDirection = Vector3.zero;
    }

    public virtual void OnDrag (PointerEventData ped)
    {
        Vector2 pos = Vector2.zero;
        if (RectTransformUtility.ScreenPointToLocalPointInRectangle
            (bgImg.rectTransform, ped.position, ped.pressEventCamera, out pos))
        {
            pos.x = (pos.x / bgImg.rectTransform.sizeDelta.x);

            float x = (bgImg.rectTransform.pivot.x == 1) ? pos.x * 2 + 1 : pos.x * 2 - 1;

            InputDirection = new Vector3(x, 0, 0);
            InputDirection = (InputDirection.magnitude > 1) ? InputDirection.normalized : InputDirection;

            joystickImg.rectTransform.anchoredPosition =
                new Vector3(InputDirection.x * (bgImg.rectTransform.sizeDelta.x / 3), 0);
        }
    }

    public virtual void OnPointerDown(PointerEventData ped)
    {
        OnDrag (ped);
    }

    public virtual void OnPointerUp(PointerEventData ped)
    {
        InputDirection = Vector3.zero;
        joystickImg.rectTransform.anchoredPosition = Vector3.zero;
    }

And this is script for player:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class PlayerControl : MonoBehaviour {

    float speed;
    public int manaNum;
    public int maxMana;
    public float accelerate;
    public float jumpForce;
    public bool grounded;
    Rigidbody2D rb;
    public VirtualJoystick moveJoystick;
    GameObject mana;

    private Touch touch;

    void Start () {
        rb = GetComponent<Rigidbody2D>();
        mana = GameObject.Find("ManaText");
        manaNum = maxMana;
       
    }

    void Update()
    {
        Mana();

        if (grounded)
            if (moveJoystick.InputDirection != Vector3.zero)
            {
                speed = moveJoystick.InputDirection.x;
            }
            else
            {
                speed = 0;
            }

        rb.velocity = new Vector2(speed * accelerate, rb.velocity.y);
        Debug.Log(speed);

        if (speed >= 0)
        {
            transform.rotation = Quaternion.Euler(new Vector3(0, 0, 0));
        }
        else
        {
            transform.rotation = Quaternion.Euler(new Vector3(0, 180, 0));
        }
    }

    public void Jump()
    {
        if (grounded)
            rb.velocity = new Vector2(0, jumpForce);
    }

    void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject.tag == "Ground")
        {
            grounded = true;
        }

        if (collision.gameObject.tag == "Star")
        {
            if (manaNum < maxMana)
            {
                manaNum += 1;
                Destroy(collision.gameObject);
            }
        }
    }

    void OnCollisionExit2D(Collision2D collision)
    {
        if (collision.gameObject.tag == "Ground")
        {
            grounded = false;
        }
    }
   
    void Mana()
    {
        mana.GetComponent<Text>().text = "MANA: " + manaNum.ToString();
        float relativeManaBar = (float)manaNum / (float)maxMana;
        GameObject.Find("ManaBar").transform.localScale = new Vector3(relativeManaBar, transform.localScale.y, transform.localScale.z);
    }

When i try to use Debug.Log() for speed information, then i can see, when it freez then speed is not 0 but 0.12…
I think it look like problem come from:
if (moveJoystick.InputDirection != Vector3.zero)
{
speed = moveJoystick.InputDirection.x;
}
But i dont know if i have true and what to do with it.

Thx for help.

2

Ok I find where is problem, i just changed:

void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject.tag == "Ground")
        {
            grounded = true;
        }
        if (collision.gameObject.tag == "Star")
        {
            if (manaNum < maxMana)
            {
                manaNum += 1;
                Destroy(collision.gameObject);
            }
        }
    }
    void OnCollisionExit2D(Collision2D collision)
    {
        if (collision.gameObject.tag == "Ground")
        {
            grounded = false;
        }
    }

for this:

void OnCollisionStay2D(Collision2D collision)
    {
        if (collision.gameObject.tag == "Ground")
        {
            grounded = true;
        }
    }
    void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.gameObject.tag == "Star")
        {
            if (manaNum < maxMana)
            {
                manaNum += 1;
                Destroy(collision.gameObject);
            }
        }
    }
    void OnCollisionExit2D(Collision2D collision)
    {
        if (collision.gameObject.tag == "Ground")
        {
            grounded = false;
        }
    }