Cutaway courtesy clefs don't show in cutaway

When switching on "cutaway" in the staff properties, a courtesy clef that has been added to a measure shows up most of the time as expected. However, when there is a time signature present, the courtesy clef is no longer visible.

I've noticed that if there WAS a time signature in the measure but it was deleted, the courtesy clef is still prevented from appearing (this is fixed on a restart of MuseScore though...

This is from Cutaway courtesy clefs in 3.6 nightly don't show before time signatures which has the original report and pictures and files.