Pausing audio with fn+down arrow not working anymore

[Marius Teodorescu]

Hello guys. I am using windows 10 64 bit on an ASUS X556UB notebook. Lately I had a strange issue. I used to be able to play/pause a song(Spotify or Windows Media Player) just by pressing fn and down arrow. A few days ago it just stopped working. The fn key is working and so does the down arrow key(I checked them out), but the combination of both doesnt. I also have the latest drivers for the keyboard. What is strange about this issue is that it works when I have the device manager window open. Please, if anyone knows what this is about, please help. Thank you in advance.