ofc it’s active. if nobody knows an answer, nobody gonna responds. simple as that. anyway…
what’s the backbuffer format? and what is the output format? maybe you should output exr in 16-bit color depth. so you could crunch it into a 10-bit video codec. color banding in low light situations is kinda normal in 8-bit color depth. there’s a limited number of grey steps you can have. color correction or color space modification may even make it worse. if you stretch the space too much. 1 step of grey could become 2.
maybe just don’t mess with ocio and colorspaces. or find a combo where it is less noticable. maybe try without any correction or conversion. light it natively or better.