Issue when using show courtesy time signatures feature on a local time signature

MS 3.5 RC, Windows 10
Action-
In measure 173 (page 68) of the attached, the Pk. II (timpani) stave, CTRL+Click to select the 9-8 local time signature.
From the pop-up select "Show Courtesy Time Signature".
Expected result- a courtesy time signature is created only for Pk. II/timpani stave.
Actual result- courtesy time signatures are created for every stave.

As a work-around I elected to insert some 9-8 text in the previous measure. The other option is to actually enable all the courtesy time signatures and CTRL-select them one at a time and press V, but this still leaves a space at the end of the stave that is not appropriate.
FYI 3.5 RC seems a bit more robust when working with the 9-8 + simultaneous 3-4 time signatures that tend to produce corruption error messages when loading the score (or maybe it's just coincidence/my imagination).