It's very likely an artifact of CFG (classifier-free guidance), hopefully some days will be able to ditch this kinda dubious trick. This is also the reason why

It's very likely an artifact of CFG (classifier-free guidance), hopefully some days will be able to ditch this kinda dubious trick. This is also the reason why the generated images have this characteristic high contrast and saturation. Better models usually need to rely less on CFG to generate coherent images because they fit the training distribution better.