Keyboard inputs randomly drop in Unity 5.4

I just updated to Unity 5.4, and now when I use the Horizontal and Vertical input axis (“wasd”), sometimes the value will drop to 0 randomly, even though I don’t let go from any of the key.

Any way I can fix this?

check the input manager and see if there’s anything wonky in there, if you need it, look up online how it should look