I think it is meant to work this way since it uses the Flash engine, which does its own magic and does not support invisible offline buffers plus there may be things with its hardware acceleration and security stuff also figuring into the equation....
Sorry, I would like to revisit this. It is a major problem.
I am running the AE dept. of an animated TV show, and without being able to use a render farm, much time is wasted with manually rendering things. I would really like to find a solution to this problem.
My only solution thus far has been to pre-render all my SWF elements as Lossless movies. This is however too slow, and must also be done manually. It is not feasible for our pipeline to do this. We are getting updated SWFs on a regular basis.
Just wanted to throw this out there and get anyone's advice on how I can make SWFs work in my pipeline. Thanks!