When I was in The Shadow Cleft delve in Clockwork City to do a daily quest last night, the map was not displaying anything besides the map itself-- no blue marker to indicate my position, no exit (which is usually visible from the quest pointer for any quests outside of the area), no markers or shaded circles for quest objectives, no icon showing the skyshard. I checked my map filters, and I had everything selected as usual, although turning off all options would not have affected whether or not a blue pointer was displayed for my position on the map. I also reloaded the UI, but that had no effect. And after I left the delve and confirmed that the map of the zone itself was working as expected, I went back inside the delve to see if it was working again, but the map was still "blank" as far as not displaying anything besides the image of the map itself.