I noticed this today, not a bug really or anything i’m bothered about but i noticed it and waiting for lots of data to load so thought i’d post it to kill time!
the distance in game changes once you have passed that distance (i.e. it doesn’t say 15 miles until you cross the line to hit 15 miles) whereas in the companion app it rounds to the nearest .1 of a mile (or KM if you use the wrong units!) so it will show 15 miles when you have done 14.95 miles.
not the biggest drama in the world and the game value used to do the same so i guess it has been that way since the change.