In a piano part I am working on, the first 25 (or so) measures are written with notes in both hand. In this section, brackets and barlines looks fine.
After this there is a fairly long period of slashes with chords, in which I have let Dorico hide the LH staff. Also this looks fine. In one particular place I want a two hand chord to be played so I notated this with notes in both hands. Dorico reacts correctly on this and shows both LH and RH staves around this chord. But for some reason, both bracketing and “connected bar lines” fail.
I haven’t made any changes to anything that has with bar lines to do. Also there are no meter changes along the way to the later point.