For me it always seems to put the junction more or less where I crossed the first wire (Firefox on Windows)
What browser are you using and what platform is it running on?
Now I kind of get that this is an EXTREME example.
The other times it wasn't this tight for space.
But it is an example.
Grid size 10
Way better resolution that the nodes and their spacing.
Sorry it is so tightly cropped.
(hindsight, etc)
But you can see the space between the button and the change. (The switch is half occupying the space, so there must be room between the two nodes)
Where I am going to put the junction. This is about where I dragged the mouse to put in the junction also.
Just so it can't be suspected I did it close the other junction.