Protect from wire connection on edge of hierarchical blocks

Hi all,

I find it hard to detect two pins of an hierarchical block that are connected by a wire link if the wire is placed on the edge of the hierarchical block outline. This has created faulty layouts in the past. 

The picture below shows the issue where test and test2 are connected by a wire link.

Is there a way to prevent this issue (e.g. block wires on top of hierarchical blocks)? Or is there at least a better way to spot this?

Kind Regards 

 Martin