adjustment layer causes layer to disappear

I have a bunch of 3D precomped layers which are stacked underneath some other layers. I want to add an adjustment layer above the 3d layers but when I add one its ok if its at the top but if drag it down to sit above my 3d layers they turn invisible.   Not sure why. There is no effect on the adjustment layer.   I can still see thir outline but the image disappears.