I have found that the the "new" issue view shows a strike through open issues I have linked. Easiest way to explain is with the screen shots.
I did discover that someone had created a resolution status of "unresolved", which I have since removed. There were only 2 issues that had been populated with that field, so I don't think this is fully related.
My main concern is linked issues should have the strike through unless they are in face fully done and resolved. First screen shot is the old issue view and second is the new issue view.

