With version 0.8.0 I made a save file where I have all achievements that where there at the time. When I start a new cycle with version 0.8.3 or 0.8.5 (haven't tested other versions) some achievements, that I already had, are locked again.
I have a save file with all achievements unlocked and if i start a new cycle with the current version I have to unlock Memories of Cray, Nyx and Apothus again. Is that a bug?
