I've been playing this Fjordur world on my Xbox since official shut down.  I always load as non-dedi, even though it is just me - to avoid any SP nerfs.  The game crashes every so often, so I always "admincheat save world" frequently and before exiting.  I was in a hurry earlier today and did the save command and turned off the game very quickly after, like possibly before the save completed.  I got back into Ark this evening.  Fjordur doesnt have a save (diskette) icon next to it.  If I load it