Revert it to this.

code/modules/research/xenoarchaeology/tools/tools_anoscanner.dm

@@ -16,9 +16,6 @@
 	return src.interact(user)
 
 /obj/item/device/ano_scanner/interact(var/mob/user as mob)
-	if(world.time - last_scan_time >= scan_delay)
-		scan()
-
 	var/message = "Background radiation levels detected."
 
 	if(nearest_artifact_distance >= 0)
@@ -26,6 +23,10 @@
 
 	user << "<span class='info'>[message]</span>"
 
+	if(world.time - last_scan_time >= scan_delay)
+		spawn(0)
+			scan()
+
 /obj/item/device/ano_scanner/proc/scan()
 	last_scan_time = world.time
 	nearest_artifact_distance = -1