The use of output tone mapping, as configured in the Wide Gamut (Tone Mapped) preset, can have the effect of slightly darkening SDR media that’s being converted to a wide gamut working color space. This isn’t a problem for camera original SDR media that needs to have its color adjusted anyway, keeping in mind that all color adjustments happen before the output tone mapping is applied, so you’re always adjusting the source levels. However, it can be a problem for mastered SDR media that’s been previously graded, which now looks different. Be aware this issue can be minimized using the Wide Gamut (Minimal Tone Mapping) preset, which limits tone mapping to only the highlights of SDR clips, and has the added benefit of tone mapping out-of-gamut highlights.