I am having an issue where the vertex that I have selected does not highlight connected edges. This happened sometime when I was modelling and it is starting to annoy me. Following this link, It says that un-checking the edge under mesh display would make the highlight disappear. I checked it and its still checked.
Loading a new file seems to display the edge highlighting and this leads to the assumption that I might have accidentally hit another shortcut that caused the edge to not highlight.
How can I fix this issue?