I have been searching for this exact issue for some time now and got to this thread.
FWIW, the card selection trick did not do it for me. What did work for me (at least temporarily) is deselecting “triple buffering” but keeping everything else maxed out, including Ray tracing and DX12.
This is my system:
Gigabyte z390 Aurus Master
Geforce 2080Ti FE