Hi, I've been having the same problem (both on a 3rd gen iPad and an iPhone 6) ever since the 7.6.2 update. The notes are blank on iOS but perfectly fine in the web and desktop clients - there's no data loss. There's something very weird happening on the iPhone (yet it seems like the best temporary solution for now): when I open a note and it's blank, if I pull down the notification center and wait for a second, it (magically) solves the problem and the content appears. In the same way, opening a note from the notification center works too, while opening the same note from the app doesn't. On the iPad, I've also tried deleting the app, restarting the device and reinstalling it, and it worked for a few days... but then went back to not loading notes at all and crashing.