Hello, I noticed something:
I emptied a
softhyphen that previously had contours and set the left and right metrics key to
=0, as well as the the width key. If I click Glyph > Update Metrics, the side bearings update, but not the width. So my empty
softhyphen still had a width of 300 (for example). I had to click on the circle arrow in the glyph info panel to update the width.