When I have a corner node with 2 bcps, and then double click the node point, it used to be that it would change to a green smooth point then I could move one of the bcps to fix the other bcp into a smooth corner.
Now when I double click the corner node Glyphs App automatically tries to guess how the node should become smooth: sometimes it snaps to the horizontal/vertical, sometimes it averages it.
I preferred the old behaviour where it didn’t immediate smooth out. It was more useful when I could retain one of the curves because normally one side is already correct:
