I'm playing the campaign, strictly on the cloth map. When I visit a POI, (such as the first campsite or the outpost in the swamp) it properly dissappears initally. Once I leave the area, however, the moment the Fog Of War covers the tile up again, the POI re-appears in the square, until I hit the 'turn' button.

It sounds like the tile isn't properly swapping to fully cleared, or something? I dont know if you have two tilesets, one for FoW covered and one for FoW uncovered, but when visiting a POI, it doesn't appear to properly reset the 'FoW covered' state of the tile, if you follow me. Once it's recovered and a turn passes, the game updates it again.

EDIT: OK, weirder now, they keep re-appearing, and disappearing, not even when under FoW.