If this is about the tiny hallway from last time- that was intended to be a servant passage. Not the alcove she actually hid in- because she didn’t hide in it. She stayed in his blind spot the entire time till he reached an intersection where she found a door with the light on (shown in this page). She waited quietly for the guard to move on before she focused on the door. Some of this is very hard to show in panel without text, but I think the pacing and her being able to walk behind him and hiding behind him even as he spun around was a good enough clue that she didn’t need to duck into a corridor to avoid him. She just reached a destination.