Strangely, all the Alt+Shift+alpha step inputs are working with the exception of Alt+Shift+B, which fails to work at all. All others correctly insert note at the higher octave. I have tried with a new, clean project, resetting key commands, reinstalling Dorico, deleting Dorico preferences.
I haven’t messed around with the JSON file or anything strange - mine is a new vanilla installation.
Also strangely, in Write mode, Alt + Shift + B toggles Insert mode, despite there being no keyboard shortcut for it. Is this perhaps a symptom?
Although this is an annoyance, Dorico has been brilliant (I’m arranging a Brahm’s sextet). By now (using Sibelius) I would have had 100 crashes. Haven’t quite got used to Dorico’s foibles but so far so good…