Grace notes don't display correctly when changing clef

In the attached score, if I drag and drop a trebble-8-below-clef onto the bass clef then all the notes display correctly except the grace notes which don't change position.

Interestingly, the notes themselves seem to be correct, if I now click on one of the grace notes and hit the down arrow it jumps to one semitone below where it should have been to begin with.