I haven't animated anything in my test either, but it is doing the same thing. If you did animate something and wanted to use it with the replicator seems like this would be a problem.Did you try it with an actual vector motion blur object?I wonder if you have to do this before you replicate. Seems like w/ no animation it should do nothing instead of the blur. Can't hurt to report it and see what they say.

No need to think outside the box....
    Just make it invisible.