move to mob/living/Login so this fix applies to all simple animals

code/modules/mob/living/login.dm

@@ -29,4 +29,6 @@
 	//Should update regardless of if we can ventcrawl, since we can end up in pipes in other ways.
 	update_pipe_vision()
 
+	walk(src, 0) // if mob is moving under ai control, then stop AI movement
+
 	return .

code/modules/mob/living/simple_animal/hostile/terror_spiders/ghost.dm

@@ -42,6 +42,5 @@
 		to_chat(user, "<span class='notice'>Someone else already took this spider.</span>")
 		return
 	key = user.key
-	walk(src, 0) // if spider is moving under ai control (already aggroed on something before player control), then stop AI movement
 	for(var/mob/dead/observer/G in GLOB.player_list)
 		G.show_message("<i>A ghost has taken control of <b>[src]</b>. ([ghost_follow_link(src, ghost=G)]).</i>")