Still happens on 1.7.8/14w11b and is very annoying.
Its fairly easy to reproduce:
1. Start a creative world and create a map. Make 3 clones of it (total nr of the same map is now 4). 2. Place 4 item frames and place 3 map clones in the first 3 of them. (so far so good; 3 green markers and 1 white marker are visible on the map). 3. Place the 4th map clone in the 4th frame. BUG: 4th green marker doesn't appear ! White marker is still present though. 4. Now clone a 5th map. Look at the map. BUG: White marker has now disappeared. But you can now see 4 green markers.
I think I have seen this happen with only 3 total markers, but I don't know why its sometimes 3 and sometimes 4. Perhaps its if you share the map with someone else. Because then you'll have 2 white markers and will reach a total of 4 with just 2 green markers. But I've also seen it happen with less when moving in and out of range of individual markers several times.
Restarting the server can fix this temporarily because it removes green markers that are out of range, bringing the total of markers below 4 again. But if you get within range of them and they're added to the map and you reach 2-3 green markers, you risk having the bug reappear.
If you knock the maps out of the item frames so the total number of markers goes below 4 again (e.g 1 player marker, 2 green), you get your white marker back.
Uwe Hideki Matzen
Still happens on 1.7.8/14w11b and is very annoying.
Its fairly easy to reproduce:
1. Start a creative world and create a map. Make 3 clones of it (total nr of the same map is now 4).
2. Place 4 item frames and place 3 map clones in the first 3 of them. (so far so good; 3 green markers and 1 white marker are visible on the map).
3. Place the 4th map clone in the 4th frame. BUG: 4th green marker doesn't appear ! White marker is still present though.
4. Now clone a 5th map. Look at the map. BUG: White marker has now disappeared. But you can now see 4 green markers.
I think I have seen this happen with only 3 total markers, but I don't know why its sometimes 3 and sometimes 4. Perhaps its if you share the map with someone else. Because then you'll have 2 white markers and will reach a total of 4 with just 2 green markers.
But I've also seen it happen with less when moving in and out of range of individual markers several times.
Restarting the server can fix this temporarily because it removes green markers that are out of range, bringing the total of markers below 4 again. But if you get within range of them and they're added to the map and you reach 2-3 green markers, you risk having the bug reappear.
If you knock the maps out of the item frames so the total number of markers goes below 4 again (e.g 1 player marker, 2 green), you get your white marker back.