I use Notes extensively during my study and prep process. I select a verse reference and create a note, and end up with a note that is "keyed" to that verse. That's the "attachment point." At that point the Bible text shows a little yellow note icon telling me that I have created a note for that spot in the text.
Good so far.
But, for the second time in the last couple of weeks, recent notes (not all) have suddenly lost their attachment points. It's not the next time I use Logos; I'm in and out a couple of times a day, and I just saw that attachment points created as far back as last Tuesday have now disappeared. There are not little note icons in the Bible text. The title bar for that particular note simply says "Title" in gray italics, as a non-attached note.
It probably doesn't need to be said, but this is REALLY frustrating.
My Logos version is 6.0b SR-3 6.0.2.0079.
I use a Macbook Pro, running Yosemite.