Final render pass in Composed filter rendering the filter instead of blitting the texture

Filter gets applied twice. Once in the first pass and also once in the last render pass, whereas the last pass should only blit the texture to the render buffer.

Inspect the Composed filter rendering flow and compare the first pass with the final render pass. Reproduce the issue by checking whether the filter is applied twice; done means the first pass applies the filter and the final pass only blits the texture to the render buffer.

Written by the indexing model from the issue text.