On hover not working on icons. Lets replace it with a cooler system anyway

When i hover over a dot on the map it is supposed to show a popup with details of whats inside that dot, but it seems to be broken

Am i wrong in thinking it would actually be far cooler, and less redundant if instead hovering over an icon on the map added a highlight to which list item it is. For example in the image above the dot is ‘Wiggles’. If i hover over it maybe Wiggles in the list on the left can light up. If there are many posts in the list it would also need to scroll users to that list item.