Ok, this might be the very last thing I need for the score of this project. Here we go… Why is this vocal part exempt from the key change? Everything else looks good, there are no clef changes or anything I can see in Galley view. For some reason, the vocal part just chooses to stay atonal. Any ideas? I’ve depicted it below.
It looks like you have local key signatures, so you would need to change each part where it changes.
You would need to post (an excerpt from) the Dorico file.