Same issues here as the others with 3.19. With iCue running I have an unplayable computer (framerates jump all over the place and never consistently). When I uninstalled 3.19 everything went back to normal.
Latencymon blames the nvidia driver, but I've futzed with many different versions to no success. I finally resorted to loading a system image from the first of the month just to get rid of all the nasty.
I'd be happy to provide a dxdiag or any other log to whoever needs it on the Corsair side.
Quick specs for reference:
Windows 10 Pro Build 18970
Gigabyte Z370 Aorus Gaming 7 mobo
i7 8700k @ 4.7 Ghz w/ Corsair H115i Pro
EVGA Geforce RTX 2080 Ti XC Ultra
32GB (4x8) Corsair Vengeance RGP Pro @ 3200