We have installed HTML Map Maker module v. 1.0.4 on a DNN 7.1.2 platform, using a .png map image we have imported. We have configured a hover effect to show html content using the circular hotspot option, activating a hyperlink when clicked.
There is an issue where the hover will show a second, "ghost" image of the hotspot (although it is a square reproduction, not circular). This ghost image is positioned such that some of the time it does not show, possibly because it is out of the bounds of the map image?