Actors disappear but are still there in wireframe

After placing an actor down i can see it and apply materials to it but it will soon disappear after moving it or without me noticing, it is still in the world outliner and when i change the view to wireframe, i can see the actor, but when its in lit view and played it is not there at all. ive posted some screencaps to show you. and the hidden actor is unchecked.