Your suggestion was to check the routing, and that’s what I didn’t get to.
I’m reluctant to generate test data because a) the problem has occured once after two months of use - i.e. it’s not regular, and b) a long time spent on technical problems is a long time away from writing. I appreciate your willingness to look into even potentially small bugs, and know it can be frustrating at your end without sample data.
Nevertheless, I fixed the problem. I found from my Dropbox backups that the missing text had never reached Scrivener. There was no sign of it in Simplenote’s version history either. You’d think that this combination of backing up would cover all eventualities, and in fact, it did, though in an unexpected way. When I took the plunge and did the sync that had a ‘duplicates’ warning, the missing text came into Scrivener. It had to have come from somewhere, and when I looked in Simplenote on the web, it was in the trash for whatever reason. So I managed to get parity by deleting the duplicates I didn’t want, and synching the ones I did from Scrivener. Of course, you can feel secure once anything’s in Scrivener because of the pre-synching snapshots.
I didn’t do anything differently to cause a file disappearance, and certainly didn’t put the missing file into the trash, so there’s no procedure to reconstruct for you. However, and I don’t know if it’s related, but I found that one of my files had a — instead of a – beneath its title in Simplenote. A few days ago, I recall that the cursor on my iPad jumped (which sometimes happens in iOS) and caused me to delete a ‘-’ beneath the title of a file. I then added one back in, conscious that the text at the top has to strictly follow a format to enable synching. It turns out that the ‘-’ wasn’t deleted at all, so the one I added turned out to be superfluous, making it — instead of --. Could the extra dash have caused havoc with my synching?
Apart from this, I don’t know what happened. I’ll go back to using Simplenote again, keeping a careful eye on things, because the workflow is great.
This mishap aside, I have to congratulate you all for a joyous application. I use Scrivener with DEVONthink, Sente, and Simplenote, and I enjoy ths combination so much that I devised and run an annual workshop for postgrad researchers. Simplenote’s very good for concentrating on fragments of writing away from the overview. I will keep a closer eye on the synching from now on though.