You see that dark square on this screenshot ?

Sometimes my connection seems to freeze, and even if I can still walk on the map, mobs, NPC's, players and exits simply don't load (as you can see on the image, I use ManaPlus so a square should have appeared on magic school's entrance).
So I frequently go to the end of a map to see that I can't use the exit. And even if I wait some times, it doesn't load. I must absolutely go back to this dark square before being able to progress. It's quite annoying when I go through huge maps to discover that the exit didn't load and that I must go back to find the square, and then go back again to the exit. (Yes, I know, I should have noticed that the map was empty
