Sherminator98

I'm using the TT Sync premium edition with my Asus Z390-I motherboard to control my Riing fans, but I'm having an issue with the fans not powering off when the PC is shut down or in sleep mode. I can control speed/lighting no problem, but if they system goes into sleep mode, the LEDs and Fans keep spinning, even though they are told to shut off with the Asus software. Any suggestions or am I missing something?