ColorSpaceTransform swap

Is it normal to see slight color change between souce footage and end-comp one when using a ColorSpaceTransform node then connecting serial a swapped one after?

*Fusion 19 Beta

If the loader is set to 32-bit float and the internal processing is 32-bit float, then the differential key shows 0 - there is no change.

It could also depend on if using any form of tone mapping and saturation compression. Such algorithms aren't always perfectly invertible. Converting purely some primaries and transfer function to something and back should yield an exact inverse afaik.