Camera offsets do not function correctly on split screen

Camera offset module of particle system does not work when split screen.
It seems that it becomes the same offset as one view.

I tried reading the code a bit. I thought it was happening because I used the same pointer of VertexFactory for rendering both views.

I tried to create new VertexFactory for every views. It has became good.
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1. Open the attached project.
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2. Play game.
3. Camera offset become both split screen.
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