Top Down Camera and world-relative directions of the character

Hi everyone,
I have been trying to use Cinemachine and Unity-Standard Package to make some experimental game..since I have very limited coding experience, this might be a super beginner question for you. But I hope you guys can help me..thank you! (and apologize for my english..)

So I am using the Third person user control from standard package, and now I set the player's camera in Timeline, with first simple follow v-camera and than switch to top down v-camera, while the character is running.

But every time when the camera switch to top down, the player started to running opposite (so W become S).

I checked the code, but can only guess is the problem of world-relative direction..but I don't know how to fix it. Although, I wasn't sure if this is because of the player control or the cinemachine. Hope anyone here can guild me a way, thank you!

Code (CSharp):

1. // read inputs
2.             float h = CrossPlatformInputManager.GetAxis("Horizontal");
3.             float v = CrossPlatformInputManager.GetAxis("Vertical");
4.             bool crouch = Input.GetKey(KeyCode.C);
5.  
6.  
7.             // calculate move direction to pass to character
8.             if (m_Cam != null)
9.             {
10.                 // calculate camera relative direction to move:
11.                 m_CamForward = Vector3.Scale(m_Cam.forward, new Vector3(1, 0, 1)).normalized;
12.                 m_Move = v*m_CamForward + h*m_Cam.right;
13.             }
14.             else
15.             {
16.                 // we use world-relative directions in the case of no main camera
17.                 m_Move = v*Vector3.back + h*Vector3.right;
18.             }

 

Thank you for your reply,
I actually simply rotate the camera to have top down perspective, is there another way to do it?
(Like the world up override will do, but I didn't want to have top down the whole time)