I started saving my text to notepad as well. I’ve been burned by this a number of times and you do get tired of re-typing everything. What seems to be happening is that there’s a session timer that’s timing out while you enter your text. My guess is the timer starts when you upload the pictures and then it’s a race to enter the text and hit save/submit before it times out. This could explain why incremental saving worked since hitting save may reset the session.