Layout keyboard keep popping up after trying to hide it

I think the keyboard shows up whenever an input field has focus, so when you close the keyboard and the input field still has focus it gets re-summoned. You might need something like this:

    private void OnEnable() {
        OVRManager.InputFocusAcquired += DeactivateInputField;
    }

    private void OnDisable() {
        OVRManager.InputFocusAcquired -= DeactivateInputField;
    }

    private void DeactivateInputField() {
        if (inputField.isFocused) {
            inputField.DeactivateInputField();
        }
    }