Key signature appears 1 bar too late

I have a staff with a percussion clef that changes to a treble clef. The key signature should appear after the clef change and only appears at the next page in the score. Anyone know how to fix it?

You can add the key signature manually for this staff only with the pop-over, confirm with Alt-Enter. (Or you could load the mouse with it and Alt-click it into the score.)

Thanks - will give it a try as a workaround. What I experienced looks like a bug to be addressed.

To be fair “percussion has not been implemented”.
You have to expect there to be bugs waiting to be addressed…

I used a C Trumpet staff in an attempt to avoid the issues of percussion not being implemented (percussion can only be 1 staff line, can’t transpose notes, etc.) . It largely worked except for this clef issue.