Some images from the latest import show a pending write-back icon as shown in the screenshot.
How is that possible? The one in the screenshot is one of three images taken within seconds, nearly identical, and yet only this one (and not the others) shows the write-back pending icon after the import.
This looks OK. IMatch has created the required document id and other tags, which of course requires a write back. Maybe the other files already had these tags filled?
In my experience, it's not worth spending any time with this. Just write back and things will be fine. If not, the metadata in the file is broken, which requires a complex and expensive analysis and a bug report. I have at least 20 of these in my queue already, so expect a couple of weeks before I can look into yet another metadata mess.