I tested the described scenario but cannot reproduce the problem. It will help if you provide additional information on your interaction with Windows and iOS application between the time of the note creation on iOS (1), then editing in Windows client (2) and the time you see the reversed changes in Windows client (3) step. Did you use the iOS client again between steps (2) and (3)? If yes, did you interact with the notes in question? What is the client version on iOS? ANy of this information could be helpful for our testing.
Thanks in advance!