If I adjust the scale for either Quest POI icons or EJ Icon (to, for example, 50% each), close the map and then reopen the map, the size of the icons—as they appear on the world map—will reset to their default size**, meanwhile the slider values still show 50%.

**The icons themselves reset to their default size, but the text/symbols ( the "..." or "?", "!" symbols) within the icons stay at the slider's value (in this example the symbols stay at 50% while the circle or shield shaped part of the icon goes back to 100%)

If I adjust "any" of the sliders within Mapster's options (incl. Alpha or any other) while the World Map is still open, the icons—as they appear on the map—will change back to the size as determined by the value of the slider (50%).

-Open Mapster Options UI and the World Map side by side (enough to see sliders & map simultaneously)
-Adjust Quest POI Scale &/or EJ Icon Scale to something small, like 50%. (Icons should go to 50% size)
-Close the World Map.
-Open the World Map — Icons should be at 100% scale with text/symbols still at 50% scale.
-Adjust any slider/value and watch the icons instantly resize to 50%.
-Rinse and repeat... or not. :)

—I disabled all other addons
—I completely uninstalled the addon & removed any and all traces of it and related settings
—I then reinstalled the addon from scratch and same problem occurred.