I'm not sure if this is possibly related, but today, while using TB on iOS, I had an entire page of text disappear from one of my notes.
I was typing on my iPad with the cursor on a blank line above the existing note text. Nothing was selected. I was in horizontal view mode. I typed one sentence, pressed return, and all the text flashed, then everything except the new text disappeared. If there was an undo available, I didn't find it. I've never seen this happen before, but I'm just beginning to work the iOS TB into my workflow. I didn't have time to try and recreate it, but I'll give it a shot today. Would other users mind seeing if they can safely add text to previous notes? Perhaps it was a fluke, by my confidence is a bit shaken and I'd like to hear that it is working perfectly for others.
iMac (Retina 5K, 27-inch, Late 2015) 3.3 GHz Intel Core i5 32 GB 1867 MHz DDR3