Unison at the Beginning of a Phrase

Hello! New guy here…

In the screenshot, there’s a horn line that I want to say “a2” for the majority of it (at least until the fourth measure of the screenshot), but Dorico has opted to not join them until the line is TRULY unison to the end. I’ve gone into “Condensing Change” and clicked any option I thought would be helpful (“allow mid-phrase unisons”, “allow amalgamation for notes and chords”).

Is there another idea for how to fix this? Thank you!

Diagnosing condensing issues is impossible without seeing the source file.