I remembered one. I don't think this is very useful, but when I selected a race more than a year ago from the challenge creation column, my score was recorded from the beginning. Probably, the score before the failure of the server function remains. However, old races may get out of the challenge section and disappear, and eventually overwrite new ones.
As mentioned above, it may be a time to score especially after a multiplayer event. I have no opponent and I can't verify it lol
As a problem of this `` wait for 5 minutes '', in the case of the main account you can not access the challenge again, so make the setting of the challenge public or send a lot of challenges and play the one with the score recorded in the sub account Might be better.