Hi, I use the pen with the Lenovo Yoga 9 (got it with the laptop). I really like it a lot. However, I have the problem that it suddenly stops working. It doesn't react at all anymore although it still has battery. Half an hour later, without having done anything, it works perfectly again. However, these "interruptions" are more than annoying. Does anyone know why this is happening? Or even better, does anyone know how to fix it?