It's probably not a bug that they lose stats when you edit them, but like pigelin said, they also lose them at randomly chosen times for no particular reason at all.
Heck to the darkness
"That's fairly similar to what I thought you sounded like. Deep, gravelly, and wise sounding. Though the gravelly bit could've been mic quality?" -Atzy
"HeavenGames forbid!" -Smeagolfan24