I already reported it with the FR X-17 : https://forum.sector3studios.com/index.php?threads/formula-raceroom-x-17.8051/page-6#post-120390 But I see that I also get this bug with the M235i on Sachsenring. On this video you see some starts at a begin of the leaderboard session, then some starts after almost one hour of racing and using the restart shortcut when I fail (that means: very often ). I also noticed at the end of this session that I wasn't able to use the instant replay, the key wasn't working, I tried to bind it to another key without success. I left the session and restarted another one and then the instant replay was working.
Do the sessions not only last 1 hour, after which you have to start again, maybe this is why nothing works after an hour!
No, it's progressive and no need to wait one hour. I didn't try but I think if you only hit the restart key without running you'll have same bug just faster.
So maybe it's not the same issue, for me it's not related to online stuff and is 100% reproducible by using the "restart key" an enough amount of time.