I have notes tied to the Revised Common Lectionary. Often when I click on a "there's a note here" note icon that I placed there (in RCL), nothing will happen. This is when I already have that notebook open - I always have that window open in a saved layout. Every three years, when I come around to this particular day again, I revise the note. My workaround is to close the note window, then click on the note icon and it opens in a new window. This was not an issue 1-2 years ago.
