Whenever I turn on the Zone Map it just disappears after 1-30 seconds, doesn’t matter what I do or where I am. I’m not using any addons or scripts for anything at all. Been like this since the TBC classic release, even before we could start leveling to 70.
Edit: As of now (Jul 13) it seems that this has been half fixed. What makes it disappear right now is changing zones, or mini-zones (the places within the zones themselves).