Well, I think this is a USB 2.0 issue, where perhaps a BIOS setting isn't allowing full UEFI USB operation until Windows has fully loaded (My old NZXT Grid+v2 which used USB 2.0 for control also did this after some updates and then it didn't after others) or it's a Lian Li software bug for it's control software. I'd check to see if there are any firmware or software updates for the fan controller.