I think I use the same plugin version but my case does not show any issue on number of display in the geo mash up .
my case I set addmarkermashup="true" addmarkermashupbubble="true" addmarkermashupbubble="true" bubbleautopan="true"
check it here https://www.amatacity.com/global-map/
By the way, I have another issue, I can’t fix the zoom value, it alway auto-scale to display all location in the map. I will make another topic question about this ??