`chroma_reconstruct` mangled output

[LightArrowsEXE]

Sometimes, when calling chroma_reconstruct, the output clip gets mangled. I'm not entirely sure why this happens.

Easy way to reproduce is to call chroma_reconstruct twice, but it can happen even if you only called it once.

    crecon = chroma_reconstruct(cshift)
    crecon2 = chroma_reconstruct(cshift)

input clip

crecon

crecon2