Hi, also just encountered the same issue.
1 issue causing it maybe, was that i finally logged in via microsoft account to try get my achievements working cos i had none unlocked even though iv played 90 hours.
So i played a while, made a few saves, died in 1 spot and thought id just quit game and steam. restarted it all and some achievements started showing, however i was not at my last save location, my inventory is not what it was, iv lost my antlion sword, new star mace etc. and it keeps popping up on screen iv unlocked buff lungs! its showing i only have 2 mutations when i have 10+.
Loading old saves isnt working either, just keep ending up at my base. Please fix asap.
