Oh, that's odd. If I clear the slot entirely and then re-place the blueprint on there, it works fine. Any that were on there before still don't work.

I used to be able to right-click on blueprints and deconstruction planners in the quickbar to edit them, but cannot as of 1.1.59, though it could've broken in the 1.1.58 update. It was working in 1.1.57. I can still right-click on blueprint books to open them.