I tried to search this exact problem but I just found other issues with the leaderboard, not this one in particular.
In this picture, somehow everyone managed to do more than 24 hours of flight in the last 24 hours…
It’d be great to see the leaderboard fixed, because some of its issues haven’t been fixed since 2015.
To reproduce this bug simply go to the leaderboard and select flight time and then last 24 hours.
Using IF’s latest version on an iPad Pro.