Hi,

I try to unlock the achievement named Cobblestone.
You have to mine 1728 Cobblestone and place it in a single chest.

I've now tried in 4 different worlds, all of them in survival (without cheats) so achievements can be unlocked.
Noone of the worlds are played in creative.
But even if I try to put 1728 Cobblestone in a single chest or 3456 Cobblestone in a double chest, it won't unlock this specific achievement.

I know that the savegame allows achievements, because I've unlocked the achievement called Into The Nether, where I had to create a nether portal without cheating.
And that worked

I've also tried to log off my account, uninstalled the game, restarted computer and reinstalled the game but that didn't help either.

Have googled and tried various amount of tips and tricks, but the achievement is still locked.

Please advise with further steps in this process.