Z590 Aorus elite rev1. Fans not turning off when shutting down

[OutThere]

Hi as mentioned in the title the fans are not turning off. I am using this motherboard with win 2019 server. what was happening is i would install the server and then gigabytes motherboard drivers, then the drive would be inaccessible. I could see the files and folders in another win os. The MB bios was F!, flashed to F8 and now its good. the only issue is when i shut down the fans stay on . the computer seems to shut down everything turns off except for the fans and the power supply.