World Edits not Saving

For the past week, I've had an extremely irritating bug fairly consistently not save edits. I play in creative and after an hour or two of building I will switch apps, the app will crash or even hit "save and exit" and yet... the majority of my edits don't save. I have re-built more than 10 hours of work in my world already. I'm no longer willing to play until this bug is resolved. Please let me know when you have a resolution. Thank you.