I’ve noticed for the past two weeks that the leaderboards do not always grab your scores at the end of a run.
You can see similar behavior before a race where you would see your score relative to others. Sometimes it appears blank, as if there is no connection to the leaderboard.
My connection is good, and other internet-enabled apps are running without hitches.
I’ve had to run most of the weekly challenges (probably 3 out of 4) multiple times before it would post a score to the leaderboard.
I’m trying not to tin-foil-hat this behavior, but it coincides with the release of Horizon 3. I hope services were not compromised.