I have a similar problem. When I use uefi bios the splash screen is shown as a black screen and after a few seconds the Windows logo appears and Windows loads. I can normally enter the uefi bios by pressing the Del key. Windows works normally and I have no problems. I can solve the problem by turning on the CSM option, but then I lose the ability to use the resizable bar.
Is it just a glitch, because I can live without it. And is this problem serious?
My card is TUF RTX 3060ti GDDR6X