There appeared to be a disconnect that occurs during a prestige that causes the achievement management system to lose count of a player's progress. A fix has been implemented that forces that progress to remain. Now worry not, as the fix put in should reference data that is being stored so that players don't have to do it all over again! 🙂 With this change, players may also receive other achievements that they have rightfully earned but not been given.
Achievement/Prestige Stat Permanence Patch
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 12786064 · public branch
Steam updated · First observed