I have the Samsung Q80T with the same issue for ps5. I emailed the codemasters team a week ago regarding this and they are aware of it fso I'm sure something will be sorted soon. Just for your information I believe it's the latest 1.0.3 update because I played the game in its standard version when I got the PS5 in high frame rate mode and it didn't have an issue then. So the update somewhat has something to do with it. Hope this helps.