I saw this reported in 2013, but the issue is closed.
I'm running into some erratic issues with brackets. In the enclosed file, the secondary brackets on the piccolo and Horns can't be set correctly. Each time I drag the piccolo bracket to include the flutes, it snaps back to piccolo only. On the Horns, when I drag it to enclose Horns 3-4 it jumps to include all brass.
In the strings, the primary bracket will allow me to enclose through the viola, but when adding the last two strings, it seems to invert and then snap to violin 1 only.
The score is from a MIDI file, if that matters.