I just updated my iPhone 6 to iOS 10.0.2 from 10.0.1 and encountered an odd glitch with the Notes app and was curious if anyone else has experienced the same thing. Before the last update Notes was working fine but after the update, whenever i would open the app it would come up and four seconds later would disappear from the screen. Even after re-booting and a hard reset the same thing would occur. I went to iCloud from my PC and Notes worked normally there and when I went back to the phone Notes was again working there as expected. Opening Notes in the cloud from my PC fixed the issue?? Weird.