In write mode, I was able to add text to the beginning of a simple score. When I tried to add text to the fourth system of that score, the “abc” menu item on the right menu bar would not highlight. I.e. clicking on “abc” to start Text mode does not highlight and I can’t add any text to the fourth system.
Note that the other right menu items seem to work fine.
p.s. If it would help, I can upload the Dorico score file(s).