Glyphs 3.0.4 (3098):
The option to select intersection points seems to have disappeared. They get highlighted on hover, but clicking doesn’t do anything. I’m currently in the middle of a project where I use this feature to add _corner components to intersection points, so hopefully this will be an easy fix. 
Thank you! Ondrej
Works for me. Is View > Show Nodes > Extra Nodes on?
Yes, I can see them. As you can see in this video, I previously added the corner components to the intersection points without problems. Now I cannot even select them. Dropbox - Screen Recording 2021-09-28 at 18.16.08.mov - Simplify your life
is is possible that you have activated the Multi layer tool by accident?
Thank you