After changing the GPU clock (most probably), Forza Horizon 4 reset settings to default ones. At this point I remember my settings by heart, but it is annoying to enter them almost every time I want to play the game.
Forza probably thinks that GPU has been changed, but those checks are too strict… Could you please adjust the logic or add an option to use previous settings instead of “detected ones”. Simply another option like “restore previous settings” would be enough if you really need to detect GPU clock changes as another hardware. Right now I have only option to use “Low detected settings” or “Custom” and enter everything again…
I have AMD R9 390, but this is probably hardware agnostic issue.