I don't know if it's a bug (I think it's a bug), after the arrival of patch 2.5 I got the following errors:
1./ the quest icon disappeared above NPCs that can enter quests
(golden single arrow) (these are the so-called "single quests" which are marked in pale blue color) so without knowledge of Aion, a new player does not know where to go if he wants to do these quests. also the designation of quests that the player can also make sense of from the map.
2./ on the transparent map, the designation (names) disappeared
individual zones, as an example: in the Sanctum - the Colosseum