I often experience broken behaviour in the UI when working on my Surface pro 2/win 8.1 where I sometimes mix types of input and use mouse/touch/pen combined.
Using mouse input create a node, start a link from some pin and then terminate link with Touch middle-mouse click using your fingers.
After that hovering over pins don’t show any pin/data info.
Think there are more strange behaviours I’ve experienced but can’t recall atm.
Seems like there’s some internal state handled in a non-uniform way for different types of input.