I just joined a multiplayer invite from a friend via Steam. When I entered the game, all my settings were completely reset, including the setup for every track I've saved since I started playing F1 2...
Ideas
This exact same thing was happening on f1 2020.. It was discovered that if you accepted a game invite without starting the game first it wiped all data from your system with no way of retrieving any of it back. There was no choice but to start a new save and create a new profile. Ever since this I have made sure that my game was active before accepting any invites..