The past few months, my iphone has been deleting my notes without my consent. I'll just wake up one morning and the note will be gone! Why is it doing this and how can I stop it?
Why is my iphone 5 deleting my notes randomly?
I'm not sure how you can stop it from happening or why, but I lost some notes that I really needed, so know how to get them back.
I used a software for recovering lost data, including notes, SMS, calender etc from a company called Enigma Recovery. There a step-by-step guide on how to recover the lost items at this website here
As to why it's doing it, I'd suggest going on the apple forum website as there are loads of people on there who know all about iPhones and how they work and so would definitely be able to help you.
Hope that this has helped a bit :)