Leaving viewers() will now break a lock

code/modules/mob/mob.dm

@@ -174,7 +174,8 @@
 		if(!isnum(forced_look))
 			var/atom/A = locateUID(forced_look)
 			if(istype(A))
-				if(get_dist(src, A) > (client ? client.view : world.view))
+				var/view = client ? client.view : world.view
+				if(get_dist(src, A) > view || !(src in viewers(view, A)))
 					forced_look = null
 					to_chat(src, "<span class='notice'>Your direction target has left your view, you are no longer facing anything.</span>")
 					return