Resolved I setup the input system to only respond to Q/D but diagonally movement occurs when pressing ZQ/ZD

Here is the setup:



As long as I press each key alone it works well.
Q/D will move left/right.
Z/S will not produce any movement.

But ...
If I press both ZQ or ZD, it will input a diagonal movement

 

I do not find how to delete a post as I quite rapidly thought about the reason, this may help someone hopefully.

Actually it is not enough to change the Input settings asset, you must re-generate the C# script.
There is a checkbox to make it hap^pen automatically.