Player bounce when not supposed to

     void Movement(Vector2 move, bool yMovement)
     {
         float distance = move.magnitude;
 
         if (distance > minMoveDistance)
         {
             int count = rb2d.Cast(move, ContactFilter, hitBuffer, distance + shellRadius);
 
             hitBufferList.Clear();
 
             for(int i = 0; i < count; i++)
             {
                 hitBufferList.Add (hitBuffer[i]);
             }
 
             for (int i = 0; i < hitBufferList.Count; i++)
             {
                 Vector2 currentNormal = hitBufferList[i].normal;
 
                 if (currentNormal.y > minGroundNormalY)
                 {
                     grounded = true;
 
                     if (yMovement)
                     {
                         currentNormal = groundNormal;
                         currentNormal.x = 0;
                     }
                 }
 
                 float projection = Vector2.Dot(velocity, currentNormal);
                 if (projection < 0)
                 {
                     velocity = velocity - projection * currentNormal;
                 }
 
                 float modifiedDistance = hitBufferList[i].distance - shellRadius;
 
                 distance = modifiedDistance < distance ? modifiedDistance : distance;
             }
         }
 
         rb2d.position = rb2d.position + move.normalized * distance;
     }

So my issue is that sometimes when my player hits a platform it will bounce of the ground making it immposible to jump again. How can I make shure that the player stays grounded until the jump button is pressed again, instad of bouncing for no reason?