Many shapes I use within whiteboards have connector lines. Many of those diagrams have lines that cross-over. It would be helpful to have line jumps so that there isn't confusion about where the lines are intended to go.
For example, process diagrams, dependency mapping, workflow diagrams etc. The Aha! record map template I'm using at the moment has connector lines which cross when depicting within-product record alignment and cross-product record alignment.
Another way to phrase this is that when connections overlap, the user might not know if lines connect, or just pass by. To expand on a previous comment, two of the potential ways to resolve this may be 1) Insert a jump (a little arc or bridge on one line) 2) Gap one line (leave a small break in one line to show it's underneath or disconnected). A document has been attached to help illustrate the desired feature(s).
Along with a line jump feature, there should be options as well as well such as whether it should gap one of the lines or insert a jump.