Player can still move after death when dying while pressing directional keys - unity3d

Question

I am currently learning unity using c# and I made the following code using someones tutorial but I think the tutorial I am currently using as a reference is not giving me much info about this current bug. I already added a bool called dead which I placed on FixedUpdate() and Update() to check whether to accept input or not. It works well if I die without pressing directional keys like dying while attacking and dying while idle... I want to know what is wrong with my code. I would be very happy for some hints. Here is my c# code.
PlayerManager.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerManager : MonoBehaviour
{
Rigidbody rb;
public float x, y, ms = 3;
Animator animator;
public Collider weaponCollider;
public PlayerUIManager playerUIManager;
public int maxHp = 100;
public int hp;
bool dead;
// Start is called before the first frame update
void Start()
{
hp = maxHp;
ms = 3;
playerUIManager.Init(this);
rb = GetComponent<Rigidbody>();
animator = GetComponent<Animator>();
DisableWeaponCollider();
}
void Update()
{
if (dead) return;
x = Input.GetAxisRaw("Horizontal");
y = Input.GetAxisRaw("Vertical");
if(Input.GetKeyDown(KeyCode.Space))
{
animator.SetTrigger("Attack");
}
}
void GetDamage(int damage)
{
hp -= damage;
if (hp <= 0)
{
hp = 0;
dead = true;
animator.SetTrigger("Die");
}
playerUIManager.UpdateHp(hp);
}
private void FixedUpdate()
{
if (dead) return;
Debug.Log("fixed updating");
Vector3 velocity = new Vector3(x, 0, y) * 0.29f;
Vector3 direction = transform.position + velocity;
transform.LookAt(direction);
rb.velocity = velocity;
animator.SetFloat("Speed", rb.velocity.magnitude);
}
private void OnTriggerEnter(Collider other)
{
if (dead) return;
Damager damager = other.GetComponent<Damager>();
if (damager != null)
{
animator.SetTrigger("DamageReceive");
GetDamage(damager.damage);
}
}
public void EnableWeaponCollider()
{
weaponCollider.enabled = true;
}
public void DisableWeaponCollider()
{
weaponCollider.enabled = false;
}
}
DieBehavior.cs (for my die animation)
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class DieBehavior : StateMachineBehaviour
{
override public void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
{
animator.GetComponent<PlayerManager>().ms = 0;
}
//override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
//{}
//override public void OnStateExit(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
//{}
//override public void OnStateMove(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
//{}
//override public void OnStateIK(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
//{}
}

Answer 1

The issue comes from because rb.velocity is still set.
So you need to reset velocity together when you set dead flag.
if (hp <= 0)
{
hp = 0;
dead = true;
animator.SetTrigger("Die");
// Please add this
rb.velocity = Vector3.zero;
}
Rigidbody.velocity doesn't work once. It means once you set velocity, the GameObject moves until you reset velocity.
Rigidbody.velocity represents the rate of change of Rigidbody position.