I have been reporting this for I can't remember how long. I dread opening evernote on different devices. I fear will see duplicate notes.
I use iPhone and Windows Desktop app. They fail to sync too often.
Evernote doesn't seem to care about this issue. There is a simple solution.
They used to have a SYNC button on the desktop app. They removed it. They need to bring it back.
Let the user make changes and sync immediately. Your automatic sync logic doesn't work.