Linking elements near the border of the viewport.
If I try to link an card that is near the edge of the screen, the view starts scrolling as soon as I get nearby.
This makes me miss the connection as the view shifts.
Furthermore, if the current view is “heavy” (lots of cards and edges) the arc seems to shoot way off in the distance, possibly requiring to draw a looooong arc off-screen.
And this makes the rendering stutter for a few seconds.
Repro: open a diagram with lots of cards and edges. Place a card top left, and another bottom right, near the edge of the window. Draw a connection from the top-left box to the bottom right box. Almost certainly you’ll experience what I’m talking about.
Idea: make the margin edge scrolling smaller or less sensitive or slower when dragging an edge.