Explorable Areas do not load correctly

When i go into an explorable area and i move around, there is no red trail where i just went when i press the "m" key. This only happens sometimes and usually restarting GW fixes the problem, but now the Undercity in Factions is constantly bugging like this no matter what, what is my problem?

Um,...try "U" for mini map, wasn't "M" use for normal map? And you can't see the red dots on the normal map, I think.