Ideas
So a quick update today, as it stands, with DLSS Frame Generation not working, the frame rate is too choppy, so I decided to reduce the graphics settings from Ultra down to High to try and free up some fps. This worked as it started to run around the 100fps mark.
I played a few tracks and things were running smoothly albeit not running at Ultra settings, I then went back into graphics settings and re-ran the benchmark test and much to my surprise it was now churning out over 300fps. Had a closer look at I could definitely see ghosting during the test on the front wheels and wing which confirm that DLSS Frame Generation x4 was working again.
I am not sure what trigged it to start working again, as mentioned previously it does seem to be a issue and its intermittently working without any real consistency. I will report back when it stops working again but as it stands, I am unable to pin point why the graphics settings remain inconsistent.
Can one of the developers please take a look? I would also request that the ghosting during DLSS Frame Generation also be looked at, as it could be a easy fix.