There are no problems in the scenery, as you can see in the video I just made now, in FSX, with traffic enabled, anti pop-up to 30, as suggested.
If the pauses happens every 4 seconds, it usually indicates a missing object, but this can also be a missing AI traffic model or a missing texture, and if that missing AI ( due to schedules and parking assignment ) can only be seen there, you might think the scenery has a problem, but it doesn't.