I think I've reported this before, when you make a splatter map from "Image on map" plugin, save it in an NPC shop and restart that map is turned into a single map, not a splatter map any more, the additional data that makes it a splatter map must be lost at reboot.
https://www.spigotmc.org/resources/imageonmap.26585/
I think I've reported this before, when you make a splatter map from "Image on map" plugin, save it in an NPC shop and restart that map is turned into a single map, not a splatter map any more, the additional data that makes it a splatter map must be lost at reboot.
DTL: 6.4.9 PurPur 1.18.1 (1563)