In the achievement "Unique Collection" after I slay any given monster on the list, that monster is marked with a "check", showing that I already slayed that monster. So far so good...
But a few minutes later, or when I log out, it "rollsback" and the "check" mark disappears.
I'm doing this achievement with friends, and I'm the only one with this problem.
I have tried with several monsters (killed High Cultist Murdos twice, Grimnight The Soulless 3 times, Saha The Slasher, Gormungandr... and so on...) and it's always the same, after a while it "rollsback".
Also The achievement "Hunter or Hunted" & "The One Percent" are not also saving correctly in my account.
I pick up gold, the value showed on the achieve list increases, but when I logout it "rollsback". Same as described above on "Unique Collection" and also the same for the number of demon kills on "Hunter or Hunted".
Already tried to Re-Install Diablo, Different characters, Hardcore, Softcore, Different PC, etc...
I play on Europe Servers. Don't know if that's relevant to the case.