So I have a weird problem that started recently. I was backing into my slip and all of a sudden the stern of the boat started to shake or wobble Side to side . I put it into neutral and back in reverse a few times and it stopped. It doesn’t happen every time I go out but it has happened a few more times since the first time . I would have bet I had something wrapped around a prop or even a bent blade the way it was acting . I checked the props and they look perfect. My boat has 2 5.0 engines with dpsm 195 duo prop drives . I have no issues underway, only seams to happen at idle speed, mostly in reverse. Has anyone experienced anything like this ???????