[newbie] Vector3.Reflect not working properly. Please help

I created a script that when a bullet hits a gameobject with a tag "environment", it should bounce/reflect. It works fine on some gameobjects but for some gameobjects the bullet gets stuck on their collider and doesn't bounce. I made sure that all of the objects are tagged. What could I be missing?

void Update(){ direction = newPos - oldPos; } void OnHit(RaycastHit hit) { Quaternion rotation = Quaternion.FromToRotation(Vector3.up, hit.normal); if (hit.transform.tag == "Environment") { newPos = hit.point; if (bounce) { Vector3 reflect = Vector3.Reflect(direction, hit.normal); transform.forward = reflect; } }