In the Features tab of Font Info, when an OpenType feature is changed to “generate Feature automatically” and there are no glyph suffixes (yet) to support it, the feature disappears from the list. That makes perfect sense, but while in the left pane the highlight moves to the next feature, the main pane mistakenly still shows the old code for the now-removed feature. It should instead update to show the contents of the feature now highlighted on the left.
Likewise, and perhaps more likely to come up more often, if I use the minus button at the bottom to delete an OpenType class, the focus on the left goes to the next class but the main pane still shows the contents of the just-deleted class.
Fixed that.