Just saying. FTW 3 Hybrid 1080Ti's bios is just like a slave bios of FTW3 1080Ti, I flashed the Hybrid bios a month ago and it works. The card was identified as a Hybrid card.
During the initial installation, my FTW3 1080Ti is already switched to the slave bios and the hybrid kit was fine with it. I actually never tested the kit with the default FTW bios.
Maybe try to reinstall the default cooler, switch to the slave bios and test the clock speed. If the card works normally again then reinstall the Hybrid kit under the slave bios.
And there is an LED upgrade from Precision XOC to the hybrid kit after I flashed the Hybrid bios.