Can't add files to playlist

Hi everyone!

I have a Raspberry Pi 3 Model B+ with the latest version of LibreELEC operating system. When i'm using remote control via HTTP, i can't add files to playlist. Nothing happens when i press the "Q" button. When i'm using a keyboard it works. All the other functions works, but not this one. I have no idea what to do. By the way, my web interface skin is AWX.

Have a great weekend!