Here is a weird issue that I found when duplicating a scene for mixing in the compositor.
I copied linked a scene 3 times, then changed the start frame. This should delay the animation successively, making an echo effect.
It works in the VSE, each animation in a scene strip is delayed by the right number of frames (5 frames).
But in the compositor all the frames are rendered without regard to start frame, so no delay.
scene sync error.blend (625 KB)