Thanks for the tipI tried in my install,(latest game version,SOL,CSP 0.2.5 preview 1, many tracks of LAC and all is fine. As usual it is tricky to "remote" help on issues but imo it could be several things: Your grafixcard is soon dying or getting too hot. I dunno what your hardware is but you can try to really reinstall grafix drivers , I strongly recommend the amazing "DDU-Tool" from Guru3d for that, it really removes all old drivers, cleans up the system and then you freshly install latest drivers. I do that for many years and it's also kinda easy to use. Also check all settings in CM, game settings, maybe add a good grafix profile (look on YT there are good new profiles shown and just just click on the link and it installs in your CM. Well this is what I would try, maybe others will respond and give their hints.
I'll try this tool to uninstall/reinstall the driver. I should point out that a Geforce RTX 3050 and so far I've had no problems with CSP, and the other tracks work fine. It's strange but whatever, I'll reinstall the drivers once again.