Bug New Input System reacts only sometimes?

Hello,

i'am currently testing the new Input System, but if i enter playmode, sometimes it does nothing if i'am pressing keys?

Also pressing two arrow-keys + space for jump does not react sometimes?
Pressing two arrow-keys at the same time, will stop the player, it should be that the first one pressed get a higher priority like in old input system?

What is wrong?
I'am using the Input System directly.

Code (CSharp):

1.     private PlayerInput input;
2.  
3.     private InputAction jump;
4.     private InputAction move;
5.  
6.     private void Awake () {
7.         input = new PlayerInput();
8.         jump = input.Infantry.Jump;
9.         move = input.Infantry.Move;
10.     }
11.  
12.     private void OnEnable () {
13.         input.Enable();
14.     }
15.  
16.     private void OnDisable () {
17.         input.Disable();
18.     }
19.  
20.         Vector2 inputAxis = move.ReadValue<Vector2>();
21.         velocity.x = inputAxis.x;
22.         velocity.z = inputAxis.y;
23.  
24.         controller.Move(velocity * Time.deltaTime * speed);

With direct i mean ReadValue and the boolean triggered for the jump button.

Also i think the movement is very clumpy instead of the old input system?

are there missing informations about?