keyboard: on_press and on_release not executing if one is placed after another

Hi, I’m using on_press and on_release to store any currently pressed keys. Unfortunately, if on_press is placed before on_release, on_release is not being executed. If I switch places of on_press with on_release, then on_press is not being executed. Because of it, I’m using hook as a workaround, in which I’m checking event_type and calling proper function.

pressed_keys = []

def add_key(key):
    pressed_keys.append(key)
    return

def remove_key(key):
    pressed_keys.remove(key)
    return

keyboard.on_press(add_key)
keyboard.on_release(remove_key)    #This is not being executed

Also I have one question: Is there a simpler way of checking in on_press_key if other keys are also currently pressed? modifiers is always empty.