Major colour shift converting to prores in media encoder

Using media encoder to convert an XAVC 300 4K file to Prores 422 for one of our broadcast requirements and the colour drastically shifts when making prores. The conversion to other formats doesn't have this shift. This format worked 2022 version of media encoder and only started doing this after 2023 update is there a new tick box I am missing or is this just a bug?