Player keeps switching between "grounded" and "not grounded" while running

When I start running in either way the player sometimes detects he is touching the ground while other times he doesn't. so he constantly keeps switching between running and jumping animations. I have two bools set, One for jumping and the other for running. I have also set the transitions correctly, triple checked everything.

these are the scripts I'm using:

_This one is linked to the player:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerManager : MonoBehaviour
 {
     Animator anim;
     public ButtonMovement leftButton, rightButton; 
     int buttonL, buttonR, lRSum;
     public bool onGround = false;
 
 
     void Start ()
     {
         anim = this.GetComponent<Animator>();
     }
     
     void FixedUpdate () 
     {
         buttonL = leftButton.isOn;
         buttonR = rightButton.isOn;
         lRSum = buttonL + buttonR; 
 
         if (lRSum > 0 && onGround)
         {
             anim.SetBool("Move", true);
         } else if (lRSum == 0 && onGround)
         { 
             anim.SetBool("Move", false);
         }
     }
 
     void OnCollisionEnter2D (Collision2D obj)
     {
         if (obj.gameObject.tag == "ground")
         {
             anim.SetBool("Jump", false);
             onGround = true;
         }
     }
 
     void OnCollisionExit2D(Collision2D obj)
     {
         if (obj.gameObject.tag == "ground")
         {
             anim.SetBool("Jump", true);
             onGround = false;
         }
     }
 }

I have all floor objects tagged "ground" just like shown on script.

_This one is linked to the buttons on screen since I'm making a mobile game:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class ButtonMovement : TouchManager
 {
     public enum type {LeftButton, RightButton, JumpButton};
     public type buttonType;
 
     public int isOn = 0;
     public float jumpHeight = 0.0f, moveSpeed = 0.0f;   
 
     public GameObject playerObject = null;
     Rigidbody2D playerRigidBody;
 
     public GUITexture buttonTexture = null;
 
     void Start ()
     {
         playerRigidBody = playerObject.GetComponent<Rigidbody2D>();
     }
     
     void Update ()
     {
         TouchInput(buttonTexture);
     }
 
     void OnFirstTouchBegan ()
     {
         switch (buttonType)
         {
             case type.JumpButton:
                 if (playerObject.GetComponent<PlayerManager>().onGround)
                 {
                     playerRigidBody.AddForce(Vector2.up * jumpHeight, ForceMode2D.Impulse);
                 }
                 break;
         }
     }
 
     void OnSecondTouchBegan () 
     {
         switch (buttonType)
         {
             case type.JumpButton:
                 if (playerObject.GetComponent<PlayerManager>().onGround)
                 {
                     playerRigidBody.AddForce(Vector2.up * jumpHeight, ForceMode2D.Impulse);
                 }
                 break;
         }
     }
 
     void OnFirstTouch () 
     {
         switch (buttonType)
         {
 
             case type.LeftButton:
                 playerObject.transform.eulerAngles = new Vector2(0, 180);
                 playerObject.transform.Translate(Vector2.right * moveSpeed * Time.deltaTime);
                 isOn = 1;
                 break;
             case type.RightButton:
                 playerObject.transform.eulerAngles = new Vector2(0, 0);
                 playerObject.transform.Translate(Vector2.right * moveSpeed * Time.deltaTime);
                 isOn = 1;
                 break;
         }
     }
 
     void OnSecondTouch ()
     {
         switch (buttonType)
         {
 
             case type.LeftButton:
                 playerObject.transform.eulerAngles = new Vector2(0, 180);
                 playerObject.transform.Translate(Vector2.right * moveSpeed * Time.deltaTime);
                 isOn = 1;
                 break;
             case type.RightButton:
                 playerObject.transform.eulerAngles = new Vector2(0, 0);
                 playerObject.transform.Translate(Vector2.right * moveSpeed * Time.deltaTime);
                 isOn = 1;
                 break;
         }
     }
 
     void OnFirstTouchEnded ()
     {
         isOn = 0;
     }
 
     void OnSecondTouchEnded ()
     {
         isOn = 0;
     }
 }     
 

I also have a Touch manager script set up :

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class TouchManager : MonoBehaviour
 {
 
     public static bool guiTouch = false;
 
     public void TouchInput(GUITexture texture)
     {
         if (texture.HitTest(Input.GetTouch(0).position))
         {
             switch (Input.GetTouch(0).phase)
             {
                 case TouchPhase.Began:
                     SendMessage("OnFirstTouchBegan",SendMessageOptions.DontRequireReceiver); 
                     SendMessage("OnFirstTouch",SendMessageOptions.DontRequireReceiver);
                     guiTouch = true;
                     break;
                 case TouchPhase.Stationary:
                     SendMessage("OnFirstTouchStayed",SendMessageOptions.DontRequireReceiver);
                     SendMessage("OnFirstTouch",SendMessageOptions.DontRequireReceiver);
                     guiTouch = true;
                     break;
                 case TouchPhase.Moved:
                     SendMessage("OnFirstTouchMoved",SendMessageOptions.DontRequireReceiver);
                     SendMessage("OnFirstTouch",SendMessageOptions.DontRequireReceiver);
                     guiTouch = true;
                     break;
                 case TouchPhase.Ended:
                     SendMessage("OnFirstTouchEnded",SendMessageOptions.DontRequireReceiver);
                     guiTouch = false;
                     break;
             }
         }
         if (texture.HitTest(Input.GetTouch(1).position))
         {
             switch (Input.GetTouch(1).phase)
             {
                 case TouchPhase.Began:
                     SendMessage("OnSecondTouchBegan",SendMessageOptions.DontRequireReceiver);
                     SendMessage("OnSecondTouch",SendMessageOptions.DontRequireReceiver);
                     break;
                 case TouchPhase.Stationary:
                     SendMessage("OnSecondTouchStayed",SendMessageOptions.DontRequireReceiver);
                     SendMessage("OnSecondTouch",SendMessageOptions.DontRequireReceiver);
                     break;
                 case TouchPhase.Moved:
                     SendMessage("OnSecondTouchMoved",SendMessageOptions.DontRequireReceiver);
                     SendMessage("OnSecondTouch",SendMessageOptions.DontRequireReceiver);
                     break;
                 case TouchPhase.Ended:
                     SendMessage("OnSecondTouchEnded",SendMessageOptions.DontRequireReceiver);
                     break;
             }
         }
     }
 
 }
 

I checked everything and I still don't know what did I do wrong, If anyone can help out I'd be truly grateful. Thanks in advance.