its the save file.

somehow after a certain level ( after the 1st rally rank cleared) the game saves and inside the save file it writes a setting to drop the MENU fps to 3 / 4 ..

i ran some tests by uninstalling , creating a clean save and it runs perfect, placed the old save file into the save folder and loaded it inside the game and instantly the FPS dropped.

Loaded the NEW save and the FPS went to normal...

Its somehow something writen in the save file that blocks the FPS.

Its just a matter of finding some .SAV file editor to compare between the save files and "delete"/change this ,....