- Cmd-F and search for a suffix that will bring up multiple results.
- Select, say, four glyphs from that result and delete them Cmd-delete.
It appears that not only those four deleted glyphs disappear, but also the same number of non-deleted glyphs vanish from the view. (Those glyphs are still in the file–reloading the Cmd-F search brings them back to the view).
(I have a feeling this is related to the multiple-delete crash on which I’ve been sending crash reports.)