Can't see traffic after joining online event

When i join for example horizon open drift event, after i go back to open world and try to cruise with my friends, i can’t see traffic, this is really annoying because we cruise like in real life, and me or other guy who waited to join the lobby with 12 ppl causes accidents to happen and the only way to fix it is to restart the game. Fast traveling to festival fix the issue for short time, but we still can’t see like 30 % of traffic cars, and when we stay in single parking lot for longer time we can’t see any traffic at all, so the only way to fix this is to restart the game, wait in que to join the convoy (usually it take more than hour before spot opens).