I think I had the same problem and postet a mini-demoproject here:
For me, the problem starts when more then 2 payers are in a condensing group - wie 2 players
the brackets are kept as they should; it seems not to be the problem that Dorico creates
an additional stave for condensed players in this case.
And wouldn’t it be an interesting improvement for upcoming versions, if Dorico - whatever might happen in the “condensing world” - would keep track of the current bracket settings and create also additional corresponding bracket groups for us if needed?
Will this be possible?