Thanks for the tip Marc. Much appreciated.
I tried this, but it has no effect. No (semibreve) rest is entered. Not sure why you’re invoking Shift-B (barline) tool.
I think this may have something to do with the presence of acciaccaturas which might be confusing Dorico.
Lillie might have proposed a solution here:
In my case neither ‘Starts voice’ nor ‘Ends voice’ is switched on, whichever note is selected.
If I delete the acciaccaturas, the bar they are in still stays empty with no empty bar rest showing.
I guess this may be a bug, on the basis that Dorico cannot deal with the paradox that an otherwise ‘empty’ bar can contain an up-beat acciaccatura.