[Simon Tubbs]

I just worked this out after scratching my head for ages! If you’re working with pre-comps and you have a load of layers within the pre comp set to different transfer modes they all work if you check the continuously rasterize switch. As soon as you add an effect to that pre comp in your main comp – it’s all disabled. Simple as that. Transfer all effects to an adjustment layer or individual layers in your pre-comp and that should solve it.