This is apparently still an issue but not just with iPads and iPhone notes. I am having the same issue with blank notes on my iMac desktop computer. I just spent hours drafting a detailed itinerary with extensive color coded formatting and copy/paste confirmations. I can see the note in the snippet but when I click on it to open, it just goes to a blank note with the start a new note prompt. I didn't start typing and it still completely wiped out all of the contents of the prior note and saved that. I retrieved my note (minus about 1 hrs worth of work) from Archives and it was doing the same thing. When I click to open it, it goes to a blank note. I finally had to copy the archived note from the History and put it in Google Docs.