I was playing this track which I will provide and its a truck track. I was just trying to get a better time but the I couldn't make it up the tall mountain type thing because I just noclipped right through the speed boost and even the zero gravity powerups. I do have a video but idk how to even post it on here or its just photos. If you want the video dm me on discord - synxieballs Track - https://www.freeriderhd.com/t/944796-50-50
you probably died in the same frame as when you got the truck powerup, that lets you continue playing but can't interact with powerups including the star. one way to tell is if the vehicle countdown stops counting down. cheers