This is another huge pain and I can't believe it hasn't been fixed yet after all these years. Wall types can host wall sweeps. Such as base, chair and ceiling moldings / cornices. Great for internal perspectives & sections, but horrible for when trying to hide in plan views. Now there seems to be a checkbox inside the Visibility graphics to turn off wall sweeps as an override. Problem is, it doesn't work!
The only way to sort of get some control on the visibility of the sweeps, is to play around with the View Range. In some cases, it works, but in others, objects get hidden that you need to be shown.