Hello Handynotes devs,
I was experiencing some visual bugs for the world map and disabling your addon fixed the issues. More often than not, the world map would open and the zone would display only in a small part of the upper left of the frame with the rest being black. After zooming, it would fill the frame. I was in Broken Isles when this happened and did not test any other zones. I was using HandyNotes with only the Draenor Treasures plugin.