I spent hours on a world and usually it will save automatically and I don’t have to quit but recently it is not saving properly and is resetting the world, this has now happened two times. It also will save somethings and not the other in the world in the pictures below you can see that it saved part of the land I cleared but it did not save a map wall that was built before the land was cleared. It is also saving my inventory as it was when I left the app. Please fix this bug I hate having to restart also this is happening on Old Worlds. 

Update:

I have found out that it doesn’t matter if you constantly leave the world to save, it still won’t save sometimes. It shows the picture where I last left but it reverted back to an old save where I lost a bunch of my progress. Please fix I hate this bug.