Saturation adjustment layer over B&W color actually brings up the saturation.

[baoyu]

This is how I set up the test file.

To exaggerate the result, I duplicated several saturation adjustment layers.

Afphoto file provided in the attachment.

bug.afphoto

[Dan C]

Hi @baoyu,

Thanks for your report!

I can confirm I'm able to replicate this issue here, and I've also found issues with this document setup when converting the colour formats - so I have logged this as a bug with our developers now.

I hope this helps

[Lisbon]

Just out of curiosity i tried to see if this problem also occurred with other methods to increase the saturation.
After increasing the saturation using curves (Lab), I ran into the same problem. In fact, the values are almost the same.

 

Sat_Vibrance_LabCurves.afphoto

[Dan C]

Many thanks for your further tests concluded, as this isn't something I found in my initial report!

I'll be sure to update our developers with this now, alongside the previous report

[Lisbon]

Your welcome Dan.

[baoyu]

I can confirm this BUG hasn't been fixed in V2.