Minimap - instance maps

[Moonraiser]

Not sure if I am just missing something, but I'm not always getting an "instance" map when I zone in. I did Vortex Pin on one toon and had a map where I could see my party members etc, then did old strat on an alt and there was sort of a map. It was a solid pic, no party couldn't see much of the zone really, so I had no clue where the next wave of mobs was spawning at since there was no arrow. Is there a setting or plugin or something I need to get the instance maps for all the instances?